31012396 has 6 divisors (see below), whose sum is σ = 54271700. Its totient is φ = 15506196.

The previous prime is 31012393. The next prime is 31012409. The reversal of 31012396 is 69321013.

It is a self number, because there is not a number n which added to its sum of digits gives 31012396.

It is not an unprimeable number, because it can be changed into a prime (31012391) by changing a digit.

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, 3876546 + ... + 3876553.

Almost surely, 2^31012396 is an apocalyptic number.

It is an amenable number.

31012396 is a deficient number, since it is larger than the sum of its proper divisors (23259304).

31012396 is a wasteful number, since it uses less digits than its factorization.

31012396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7753103 (or 7753101 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 31012396 is about 5568.8774452308. The cubic root of 31012396 is about 314.1799312234.

The spelling of 31012396 in words is "thirty-one million, twelve thousand, three hundred ninety-six".