31276986990 has 128 divisors (see below), whose sum is σ = 80789529600. Its totient is φ = 7725219840.

The previous prime is 31276986959. The next prime is 31276987003. The reversal of 31276986990 is 9968967213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9393646 + ... + 9396974.

It is an arithmetic number, because the mean of its divisors is an integer number (631168200).

Almost surely, 2^31276986990 is an apocalyptic number.

31276986990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31276986990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40394764800).

31276986990 is an abundant number, since it is smaller than the sum of its proper divisors (49512542610).

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

31276986990 is a wasteful number, since it uses less digits than its factorization.

31276986990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3722.

The product of its (nonzero) digits is 8817984, while the sum is 60.

The spelling of 31276986990 in words is "thirty-one billion, two hundred seventy-six million, nine hundred eighty-six thousand, nine hundred ninety".