31287071839380 has 192 divisors, whose sum is σ = 100281452544000. Its totient is φ = 7139709844992.

The previous prime is 31287071839351. The next prime is 31287071839399. The reversal of 31287071839380 is 8393817078213.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (60).

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, 680293426 + ... + 680339414.

It is an arithmetic number, because the mean of its divisors is an integer number (522299232000).

Almost surely, 2^{31287071839380} is an apocalyptic number.

31287071839380 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 31287071839380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50140726272000).

31287071839380 is an abundant number, since it is smaller than the sum of its proper divisors (68994380704620).

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

31287071839380 is a wasteful number, since it uses less digits than its factorization.

31287071839380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48606 (or 48604 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 60.

The spelling of 31287071839380 in words is "thirty-one trillion, two hundred eighty-seven billion, seventy-one million, eight hundred thirty-nine thousand, three hundred eighty".