30893904 has 30 divisors (see below), whose sum is σ = 86460426. Its totient is φ = 10297920.

The previous prime is 30893881. The next prime is 30893917. The reversal of 30893904 is 40939803.

It can be written as a sum of positive squares in only one way, i.e., 28643904 + 2250000 = 5352^2 + 1500^2 .

It is a super-2 number, since 2×30893904² = 1908866608722432, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 107127 + ... + 107414.

Almost surely, 2^30893904 is an apocalyptic number.

It is an amenable number.

30893904 is an abundant number, since it is smaller than the sum of its proper divisors (55566522).

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

30893904 is a wasteful number, since it uses less digits than its factorization.

30893904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214555 (or 214546 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 30893904 is about 5558.2284947634. The cubic root of 30893904 is about 313.7792815113.

The spelling of 30893904 in words is "thirty million, eight hundred ninety-three thousand, nine hundred four".