30139960 has 16 divisors (see below), whose sum is σ = 67815000. Its totient is φ = 12055968.

The previous prime is 30139957. The next prime is 30139981. The reversal of 30139960 is 6993103.

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, 376710 + ... + 376789.

Almost surely, 2^30139960 is an apocalyptic number.

It is an amenable number.

30139960 is an abundant number, since it is smaller than the sum of its proper divisors (37675040).

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

30139960 is a wasteful number, since it uses less digits than its factorization.

30139960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753510 (or 753506 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 30139960 is about 5489.9872495298. The cubic root of 30139960 is about 311.2057102725.

The spelling of 30139960 in words is "thirty million, one hundred thirty-nine thousand, nine hundred sixty".