30865725 has 48 divisors (see below), whose sum is σ = 61871040. Its totient is φ = 14961600.

The previous prime is 30865711. The next prime is 30865753. The reversal of 30865725 is 52756803.

30865725 is a `hidden beast` number, since 3 + 0 + 86 + 572 + 5 = 666.

It is not a de Polignac number, because 30865725 - 2⁸ = 30865469 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30865725.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5347 + ... + 9503.

It is an arithmetic number, because the mean of its divisors is an integer number (1288980).

Almost surely, 2^30865725 is an apocalyptic number.

30865725 is the 2970-th nonagonal number.

It is an amenable number.

30865725 is an abundant number, since it is smaller than the sum of its proper divisors (31005315).

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

30865725 is a wasteful number, since it uses less digits than its factorization.

30865725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4187 (or 4176 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 30865725 is about 5555.6930260769. The cubic root of 30865725 is about 313.6838508609.

The spelling of 30865725 in words is "thirty million, eight hundred sixty-five thousand, seven hundred twenty-five".