30992160 has 48 divisors (see below), whose sum is σ = 97626816. Its totient is φ = 8264448.

The previous prime is 30992147. The next prime is 30992161. The reversal of 30992160 is 6129903.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (30992161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31804 + ... + 32763.

It is an arithmetic number, because the mean of its divisors is an integer number (2033892).

Almost surely, 2^30992160 is an apocalyptic number.

30992160 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30992160 is an abundant number, since it is smaller than the sum of its proper divisors (66634656).

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

30992160 is a wasteful number, since it uses less digits than its factorization.

30992160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64585 (or 64577 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 30992160 is about 5567.0602655261. The cubic root of 30992160 is about 314.1115808297. Note that the first 3 decimals are identical.

The spelling of 30992160 in words is "thirty million, nine hundred ninety-two thousand, one hundred sixty".