30131238 has 16 divisors (see below), whose sum is σ = 60330816. Its totient is φ = 10032360.

The previous prime is 30131201. The next prime is 30131243. The reversal of 30131238 is 83213103.

It is a happy number.

It is a congruent number.

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, 4245 + ... + 8847.

It is an arithmetic number, because the mean of its divisors is an integer number (3770676).

Almost surely, 2^30131238 is an apocalyptic number.

30131238 is an abundant number, since it is smaller than the sum of its proper divisors (30199578).

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

30131238 is a wasteful number, since it uses less digits than its factorization.

30131238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5699.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 30131238 is about 5489.1928368386. The cubic root of 30131238 is about 311.1756881349.

The spelling of 30131238 in words is "thirty million, one hundred thirty-one thousand, two hundred thirty-eight".