31339231740 has 144 divisors (see below), whose sum is σ = 100738808352. Its totient is φ = 7858925568.

The previous prime is 31339231697. The next prime is 31339231771. The reversal of 31339231740 is 4713293313.

It is a happy number.

31339231740 is a `hidden beast` number, since 3 + 1 + 339 + 2 + 317 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 31339231695 and 31339231704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4363032 + ... + 4370208.

It is an arithmetic number, because the mean of its divisors is an integer number (699575058).

Almost surely, 2^31339231740 is an apocalyptic number.

31339231740 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 31339231740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50369404176).

31339231740 is an abundant number, since it is smaller than the sum of its proper divisors (69399576612).

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

31339231740 is a wasteful number, since it uses less digits than its factorization.

31339231740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8636 (or 8631 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 36.

The spelling of 31339231740 in words is "thirty-one billion, three hundred thirty-nine million, two hundred thirty-one thousand, seven hundred forty".