31864878340 has 24 divisors (see below), whose sum is σ = 70438152960. Its totient is φ = 12075111648.

The previous prime is 31864878329. The next prime is 31864878347. The reversal of 31864878340 is 4387846813.

It is not an unprimeable number, because it can be changed into a prime (31864878347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41927092 + ... + 41927851.

It is an arithmetic number, because the mean of its divisors is an integer number (2934923040).

Almost surely, 2^31864878340 is an apocalyptic number.

It is an amenable number.

31864878340 is an abundant number, since it is smaller than the sum of its proper divisors (38573274620).

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

31864878340 is a wasteful number, since it uses less digits than its factorization.

31864878340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83854971 (or 83854969 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 52.

The spelling of 31864878340 in words is "thirty-one billion, eight hundred sixty-four million, eight hundred seventy-eight thousand, three hundred forty".