30139624 has 32 divisors (see below), whose sum is σ = 60228000. Its totient is φ = 14098752.

The previous prime is 30139601. The next prime is 30139631. The reversal of 30139624 is 42693103.

It is a super-2 number, since 2×30139624² = 1816793869722752, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30139592 and 30139601.

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, 11422 + ... + 13810.

It is an arithmetic number, because the mean of its divisors is an integer number (1882125).

Almost surely, 2^30139624 is an apocalyptic number.

It is an amenable number.

30139624 is a deficient number, since it is larger than the sum of its proper divisors (30088376).

30139624 is a wasteful number, since it uses less digits than its factorization.

30139624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2497 (or 2493 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 30139624 is about 5489.9566482806. The cubic root of 30139624 is about 311.2045538287.

The spelling of 30139624 in words is "thirty million, one hundred thirty-nine thousand, six hundred twenty-four".