31139630 has 8 divisors (see below), whose sum is σ = 56051352. Its totient is φ = 12455848.

The previous prime is 31139627. The next prime is 31139653. The reversal of 31139630 is 3693113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 31139630.

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, 1556972 + ... + 1556991.

It is an arithmetic number, because the mean of its divisors is an integer number (7006419).

Almost surely, 2^31139630 is an apocalyptic number.

31139630 is a deficient number, since it is larger than the sum of its proper divisors (24911722).

31139630 is a wasteful number, since it uses less digits than its factorization.

31139630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3113970.

The product of its (nonzero) digits is 1458, while the sum is 26.

The square root of 31139630 is about 5580.2894190176. The cubic root of 31139630 is about 314.6090050928.

The spelling of 31139630 in words is "thirty-one million, one hundred thirty-nine thousand, six hundred thirty".