30913228 has 24 divisors (see below), whose sum is σ = 57380400. Its totient is φ = 14531328.

The previous prime is 30913213. The next prime is 30913261. The reversal of 30913228 is 82231903.

It is a junction number, because it is equal to n+sod(n) for n = 30913196 and 30913205.

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, 8928 + ... + 11896.

It is an arithmetic number, because the mean of its divisors is an integer number (2390850).

Almost surely, 2^30913228 is an apocalyptic number.

30913228 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

30913228 is a deficient number, since it is larger than the sum of its proper divisors (26467172).

30913228 is a wasteful number, since it uses less digits than its factorization.

30913228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3129 (or 3127 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 30913228 is about 5559.9665466619. The cubic root of 30913228 is about 313.8446903921.

The spelling of 30913228 in words is "thirty million, nine hundred thirteen thousand, two hundred twenty-eight".