31296729492 has 72 divisors (see below), whose sum is σ = 91103044032. Its totient is φ = 8873654400.

The previous prime is 31296729449. The next prime is 31296729521. The reversal of 31296729492 is 29492769213.

31296729492 is a `hidden beast` number, since 3 + 129 + 6 + 7 + 29 + 492 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 441009 + ... + 507032.

It is an arithmetic number, because the mean of its divisors is an integer number (1265320056).

Almost surely, 2^31296729492 is an apocalyptic number.

It is an amenable number.

31296729492 is an abundant number, since it is smaller than the sum of its proper divisors (59806314540).

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

31296729492 is a wasteful number, since it uses less digits than its factorization.

31296729492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948189 (or 948184 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The spelling of 31296729492 in words is "thirty-one billion, two hundred ninety-six million, seven hundred twenty-nine thousand, four hundred ninety-two".