30465920 has 64 divisors (see below), whose sum is σ = 73513440. Its totient is φ = 12072960.

The previous prime is 30465899. The next prime is 30465947. The reversal of 30465920 is 2956403.

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, 115709 + ... + 115971.

Almost surely, 2^30465920 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 30465920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36756720).

30465920 is an abundant number, since it is smaller than the sum of its proper divisors (43047520).

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

30465920 is a wasteful number, since it uses less digits than its factorization.

30465920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463 (or 451 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 30465920 is about 5519.5941879816. The cubic root of 30465920 is about 312.3235740151.

The spelling of 30465920 in words is "thirty million, four hundred sixty-five thousand, nine hundred twenty".