31400434768 has 20 divisors (see below), whose sum is σ = 60994751220. Its totient is φ = 15659853824.

The previous prime is 31400434757. The next prime is 31400434789. The reversal of 31400434768 is 86743400413.

It can be written as a sum of positive squares in 2 ways, for example, as 7135518784 + 24264915984 = 84472^2 + 155772^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31400434768.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2516305 + ... + 2528752.

It is an arithmetic number, because the mean of its divisors is an integer number (3049737561).

Almost surely, 2^31400434768 is an apocalyptic number.

It is an amenable number.

31400434768 is a deficient number, since it is larger than the sum of its proper divisors (29594316452).

31400434768 is a wasteful number, since it uses less digits than its factorization.

31400434768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5045454 (or 5045448 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 40.

The spelling of 31400434768 in words is "thirty-one billion, four hundred million, four hundred thirty-four thousand, seven hundred sixty-eight".