31400074740 has 48 divisors (see below), whose sum is σ = 93091989312. Its totient is φ = 7880802816.

The previous prime is 31400074733. The next prime is 31400074751. The reversal of 31400074740 is 4747000413.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 31400074698 and 31400074707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15391174 + ... + 15393213.

It is an arithmetic number, because the mean of its divisors is an integer number (1939416444).

Almost surely, 2^31400074740 is an apocalyptic number.

31400074740 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31400074740 is an abundant number, since it is smaller than the sum of its proper divisors (61691914572).

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

31400074740 is a wasteful number, since it uses less digits than its factorization.

31400074740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30784416 (or 30784414 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 30.

The spelling of 31400074740 in words is "thirty-one billion, four hundred million, seventy-four thousand, seven hundred forty".