31420396 has 12 divisors (see below), whose sum is σ = 62840848. Its totient is φ = 13465872.

The previous prime is 31420381. The next prime is 31420409. The reversal of 31420396 is 69302413.

31420396 is an admirable number.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 1122157 = 31420396 / (3 + 1 + 4 + 2 + 0 + 3 + 9 + 6).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 561051 + ... + 561106.

Almost surely, 2^31420396 is an apocalyptic number.

It is an amenable number.

31420396 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

31420396 is a wasteful number, since it uses less digits than its factorization.

31420396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122168 (or 1122166 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 31420396 is about 5605.3899061528. The cubic root of 31420396 is about 315.5517197584.

The spelling of 31420396 in words is "thirty-one million, four hundred twenty thousand, three hundred ninety-six".