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30256744 = 2372931601
BaseRepresentation
bin111001101101…
…0111001101000
32002221012110011
41303122321220
530221203434
63000301304
7515115040
oct163327150
962835404
1030256744
1116096381
12a171834
136364acb
144038720
1529c9e64
hex1cdae68

30256744 has 64 divisors (see below), whose sum is σ = 69350400. Its totient is φ = 12096000.

The previous prime is 30256739. The next prime is 30256747. The reversal of 30256744 is 44765203.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (30256747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50044 + ... + 50644.

It is an arithmetic number, because the mean of its divisors is an integer number (1083600).

Almost surely, 230256744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30256744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34675200).

30256744 is an abundant number, since it is smaller than the sum of its proper divisors (39093656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30256744 is a wasteful number, since it uses less digits than its factorization.

30256744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674 (or 670 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 30256744 is about 5500.6130567419. The cubic root of 30256744 is about 311.6071375656.

The spelling of 30256744 in words is "thirty million, two hundred fifty-six thousand, seven hundred forty-four".

Divisors: 1 2 4 7 8 14 28 29 31 56 58 62 116 124 203 217 232 248 406 434 601 812 868 899 1202 1624 1736 1798 2404 3596 4207 4808 6293 7192 8414 12586 16828 17429 18631 25172 33656 34858 37262 50344 69716 74524 122003 130417 139432 149048 244006 260834 488012 521668 540299 976024 1043336 1080598 2161196 3782093 4322392 7564186 15128372 30256744