30894720 has 64 divisors (see below), whose sum is σ = 98483040. Its totient is φ = 8238080.

The previous prime is 30894719. The next prime is 30894739. The reversal of 30894720 is 2749803.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

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, 6126 + ... + 9965.

Almost surely, 2^30894720 is an apocalyptic number.

30894720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30894720 is an abundant number, since it is smaller than the sum of its proper divisors (67588320).

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

30894720 is a wasteful number, since it uses less digits than its factorization.

30894720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16113 (or 16101 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 30894720 is about 5558.3018989616. The cubic root of 30894720 is about 313.7820441021.

The spelling of 30894720 in words is "thirty million, eight hundred ninety-four thousand, seven hundred twenty".