31077082140 has 144 divisors (see below), whose sum is σ = 95108162688. Its totient is φ = 7577985792.

The previous prime is 31077082139. The next prime is 31077082159. The reversal of 31077082140 is 4128077013.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1070659 + ... + 1099301.

It is an arithmetic number, because the mean of its divisors is an integer number (660473352).

Almost surely, 2^31077082140 is an apocalyptic number.

31077082140 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 31077082140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47554081344).

31077082140 is an abundant number, since it is smaller than the sum of its proper divisors (64031080548).

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

31077082140 is a wasteful number, since it uses less digits than its factorization.

31077082140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28788 (or 28773 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 33.

The spelling of 31077082140 in words is "thirty-one billion, seventy-seven million, eighty-two thousand, one hundred forty".