30992880 has 160 divisors (see below), whose sum is σ = 102404160. Its totient is φ = 7741440.

The previous prime is 30992873. The next prime is 30992893. The reversal of 30992880 is 8829903.

It is a super-2 number, since 2×30992880² = 1921117221388800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 424524 + ... + 424596.

It is an arithmetic number, because the mean of its divisors is an integer number (640026).

Almost surely, 2^30992880 is an apocalyptic number.

30992880 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30992880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51202080).

30992880 is an abundant number, since it is smaller than the sum of its proper divisors (71411280).

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

30992880 is a wasteful number, since it uses less digits than its factorization.

30992880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 30992880 is about 5567.1249312369. The cubic root of 30992880 is about 314.1140132576.

The spelling of 30992880 in words is "thirty million, nine hundred ninety-two thousand, eight hundred eighty".