31379808 has 24 divisors (see below), whose sum is σ = 82372248. Its totient is φ = 10459904.

The previous prime is 31379767. The next prime is 31379819. The reversal of 31379808 is 80897313.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163341 + ... + 163532.

It is an arithmetic number, because the mean of its divisors is an integer number (3432177).

Almost surely, 2^31379808 is an apocalyptic number.

It is an amenable number.

31379808 is an abundant number, since it is smaller than the sum of its proper divisors (50992440).

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

31379808 is a wasteful number, since it uses less digits than its factorization.

31379808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326886 (or 326878 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 31379808 is about 5601.7682922449. The cubic root of 31379808 is about 315.4157875441.

The spelling of 31379808 in words is "thirty-one million, three hundred seventy-nine thousand, eight hundred eight".