30139736 has 16 divisors (see below), whose sum is σ = 61649640. Its totient is φ = 13699840.

The previous prime is 30139727. The next prime is 30139741. The reversal of 30139736 is 63793103.

It is a super-2 number, since 2×30139736² = 1816807372299392, which contains 22 as substring.

It is a congruent number.

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, 171161 + ... + 171336.

Almost surely, 2^30139736 is an apocalyptic number.

It is an amenable number.

30139736 is an abundant number, since it is smaller than the sum of its proper divisors (31509904).

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

30139736 is a wasteful number, since it uses less digits than its factorization.

30139736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342514 (or 342510 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 32.

The square root of 30139736 is about 5489.9668487159. The cubic root of 30139736 is about 311.2049393109.

The spelling of 30139736 in words is "thirty million, one hundred thirty-nine thousand, seven hundred thirty-six".