31396396 has 6 divisors (see below), whose sum is σ = 54943700. Its totient is φ = 15698196.

The previous prime is 31396381. The next prime is 31396439. The reversal of 31396396 is 69369313.

It is a happy 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 as a sum of consecutive naturals, namely, 3924546 + ... + 3924553.

Almost surely, 2^31396396 is an apocalyptic number.

It is an amenable number.

31396396 is a deficient number, since it is larger than the sum of its proper divisors (23547304).

31396396 is a wasteful number, since it uses less digits than its factorization.

31396396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7849103 (or 7849101 counting only the distinct ones).

The product of its digits is 78732, while the sum is 40.

The square root of 31396396 is about 5603.2487005308. The cubic root of 31396396 is about 315.4713561380.

The spelling of 31396396 in words is "thirty-one million, three hundred ninety-six thousand, three hundred ninety-six".