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30206485 = 519317963
BaseRepresentation
bin111001100111…
…0101000010101
32002211122111201
41303032220111
530213101420
62555232501
7514515361
oct163165025
962748451
1030206485
1116061641
12a148731
136347c7a
1440242a1
1529ba10a
hex1ccea15

30206485 has 8 divisors (see below), whose sum is σ = 38155680. Its totient is φ = 22893264.

The previous prime is 30206461. The next prime is 30206509. The reversal of 30206485 is 58460203.

30206485 = T4486 + T4487 + T4488.

It is an interprime number because it is at equal distance from previous prime (30206461) and next prime (30206509).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30206485 - 27 = 30206357 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 158887 + ... + 159076.

It is an arithmetic number, because the mean of its divisors is an integer number (4769460).

Almost surely, 230206485 is an apocalyptic number.

30206485 is the 4488-th centered triangular number.

It is an amenable number.

30206485 is a deficient number, since it is larger than the sum of its proper divisors (7949195).

30206485 is a wasteful number, since it uses less digits than its factorization.

30206485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317987.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 30206485 is about 5496.0426672288. The cubic root of 30206485 is about 311.4345067125.

Adding to 30206485 its reverse (58460203), we get a palindrome (88666688).

The spelling of 30206485 in words is "thirty million, two hundred six thousand, four hundred eighty-five".

Divisors: 1 5 19 95 317963 1589815 6041297 30206485