31718996400 has 960 divisors, whose sum is σ = 133043484672. Its totient is φ = 6277201920.

The previous prime is 31718996381. The next prime is 31718996437. The reversal of 31718996400 is 469981713.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 31718996400.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 183346714 + ... + 183346886.

Almost surely, 2^31718996400 is an apocalyptic number.

31718996400 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31718996400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66521742336).

31718996400 is an abundant number, since it is smaller than the sum of its proper divisors (101324488272).

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

31718996400 is a wasteful number, since it uses less digits than its factorization.

31718996400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310 (or 299 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 48.

The spelling of 31718996400 in words is "thirty-one billion, seven hundred eighteen million, nine hundred ninety-six thousand, four hundred".