30929120 has 96 divisors (see below), whose sum is σ = 78871968. Its totient is φ = 11419648.

The previous prime is 30929111. The next prime is 30929123. The reversal of 30929120 is 2192903.

It is a super-2 number, since 2×30929120² = 1913220927948800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30929120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30929123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 225692 + ... + 225828.

It is an arithmetic number, because the mean of its divisors is an integer number (821583).

Almost surely, 2^30929120 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 30929120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39435984).

30929120 is an abundant number, since it is smaller than the sum of its proper divisors (47942848).

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

30929120 is a wasteful number, since it uses less digits than its factorization.

30929120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252 (or 244 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 30929120 is about 5561.3955083234. The cubic root of 30929120 is about 313.8984620372.

The spelling of 30929120 in words is "thirty million, nine hundred twenty-nine thousand, one hundred twenty".