30388904 has 80 divisors (see below), whose sum is σ = 74258400. Its totient is φ = 11389248.

The previous prime is 30388871. The next prime is 30388907. The reversal of 30388904 is 40988303.

It is a taxicab number since it can be written as a sum of two cubes in more than one way. Here 30388904 = 26³ + 312³ = 234³ + 260³.

It is not an unprimeable number, because it can be changed into a prime (30388907) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1599407 + ... + 1599425.

It is an arithmetic number, because the mean of its divisors is an integer number (928230).

Almost surely, 2^30388904 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 30388904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37129200).

30388904 is an abundant number, since it is smaller than the sum of its proper divisors (43869496).

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

30388904 is an equidigital number, since it uses as much as digits as its factorization.

30388904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 41 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 30388904 is about 5512.6131734414. The cubic root of 30388904 is about 312.0601735791.

The spelling of 30388904 in words is "thirty million, three hundred eighty-eight thousand, nine hundred four".