30687904 has 48 divisors (see below), whose sum is σ = 66044160. Its totient is φ = 13950720.

The previous prime is 30687893. The next prime is 30687913. The reversal of 30687904 is 40978603.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29017 + ... + 30055.

It is an arithmetic number, because the mean of its divisors is an integer number (1375920).

Almost surely, 2^30687904 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 30687904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33022080).

30687904 is an abundant number, since it is smaller than the sum of its proper divisors (35356256).

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

30687904 is a wasteful number, since it uses less digits than its factorization.

30687904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133 (or 1125 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 30687904 is about 5539.6664159496. Note that the first 3 decimals coincide. The cubic root of 30687904 is about 313.0803007231.

The spelling of 30687904 in words is "thirty million, six hundred eighty-seven thousand, nine hundred four".