31700889840 has 40 divisors (see below), whose sum is σ = 98272759248. Its totient is φ = 8453570560.

The previous prime is 31700889839. The next prime is 31700889877. The reversal of 31700889840 is 4898800713.

It is a tau number, because it is divible by the number of its divisors (40).

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 31700889840.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66043281 + ... + 66043760.

Almost surely, 2^31700889840 is an apocalyptic number.

31700889840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31700889840 is an abundant number, since it is smaller than the sum of its proper divisors (66571869408).

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

31700889840 is a wasteful number, since it uses less digits than its factorization.

31700889840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132087057 (or 132087051 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 48.

The spelling of 31700889840 in words is "thirty-one billion, seven hundred million, eight hundred eighty-nine thousand, eight hundred forty".