31396856 has 16 divisors (see below), whose sum is σ = 58935600. Its totient is φ = 15680704.

The previous prime is 31396853. The next prime is 31396861. The reversal of 31396856 is 65869313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31396853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8180 + ... + 11388.

It is an arithmetic number, because the mean of its divisors is an integer number (3683475).

Almost surely, 2^31396856 is an apocalyptic number.

It is an amenable number.

31396856 is a deficient number, since it is larger than the sum of its proper divisors (27538744).

31396856 is a wasteful number, since it uses less digits than its factorization.

31396856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4438 (or 4434 counting only the distinct ones).

The product of its digits is 116640, while the sum is 41.

The square root of 31396856 is about 5603.2897479963. The cubic root of 31396856 is about 315.4728968256.

The spelling of 31396856 in words is "thirty-one million, three hundred ninety-six thousand, eight hundred fifty-six".