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30288430 = 257341491
BaseRepresentation
bin111001110001…
…0101000101110
32002222210220201
41303202220232
530223212210
63001104114
7515306314
oct163425056
962883821
1030288430
1116108167
12a18803a
136376363
1440460b4
1529d453a
hex1ce2a2e

30288430 has 16 divisors (see below), whose sum is σ = 55267344. Its totient is φ = 11949120.

The previous prime is 30288361. The next prime is 30288431. The reversal of 30288430 is 3488203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30288431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20016 + ... + 21475.

It is an arithmetic number, because the mean of its divisors is an integer number (3454209).

Almost surely, 230288430 is an apocalyptic number.

30288430 is a deficient number, since it is larger than the sum of its proper divisors (24978914).

30288430 is a wasteful number, since it uses less digits than its factorization.

30288430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41571.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 30288430 is about 5503.4925274774. The cubic root of 30288430 is about 311.7158751868.

The spelling of 30288430 in words is "thirty million, two hundred eighty-eight thousand, four hundred thirty".

Divisors: 1 2 5 10 73 146 365 730 41491 82982 207455 414910 3028843 6057686 15144215 30288430