30913128 has 24 divisors (see below), whose sum is σ = 83723250. Its totient is φ = 10304352.

The previous prime is 30913117. The next prime is 30913177. The reversal of 30913128 is 82131903.

It can be written as a sum of positive squares in only one way, i.e., 16305444 + 14607684 = 4038^2 + 3822^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 214603 + ... + 214746.

Almost surely, 2^30913128 is an apocalyptic number.

It is an amenable number.

30913128 is an abundant number, since it is smaller than the sum of its proper divisors (52810122).

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

30913128 is a wasteful number, since it uses less digits than its factorization.

30913128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429361 (or 429354 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 30913128 is about 5559.9575537948. The cubic root of 30913128 is about 313.8443519771.

The spelling of 30913128 in words is "thirty million, nine hundred thirteen thousand, one hundred twenty-eight".