30139968 has 28 divisors (see below), whose sum is σ = 79745840. Its totient is φ = 10046592.

The previous prime is 30139957. The next prime is 30139981. The reversal of 30139968 is 86993103.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78298 + ... + 78681.

Almost surely, 2^30139968 is an apocalyptic number.

It is an amenable number.

30139968 is an abundant number, since it is smaller than the sum of its proper divisors (49605872).

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

30139968 is a wasteful number, since it uses less digits than its factorization.

30139968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156994 (or 156984 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 30139968 is about 5489.9879781289. The cubic root of 30139968 is about 311.2057378068.

The spelling of 30139968 in words is "thirty million, one hundred thirty-nine thousand, nine hundred sixty-eight".