30875904 has 90 divisors (see below), whose sum is σ = 92128190. Its totient is φ = 10285056.

The previous prime is 30875903. The next prime is 30875909. The reversal of 30875904 is 40957803.

It can be written as a sum of positive squares in only one way, i.e., 22581504 + 8294400 = 4752^2 + 2880^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (30875903) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 19992 + ... + 21480.

Almost surely, 2^30875904 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 30875904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46064095).

30875904 is an abundant number, since it is smaller than the sum of its proper divisors (61252286).

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

30875904 is an equidigital number, since it uses as much as digits as its factorization.

30875904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517 (or 1494 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 30875904 is about 5556.6090378935. The cubic root of 30875904 is about 313.7183296340.

The spelling of 30875904 in words is "thirty million, eight hundred seventy-five thousand, nine hundred four".