31144307328 has 128 divisors (see below), whose sum is σ = 95088888000. Its totient is φ = 10023422976.

The previous prime is 31144307321. The next prime is 31144307329. The reversal of 31144307328 is 82370344113.

31144307328 is a `hidden beast` number, since 311 + 4 + 4 + 307 + 32 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

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 = 31144307292 and 31144307301.

It is not an unprimeable number, because it can be changed into a prime (31144307321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55150 + ... + 255597.

Almost surely, 2^31144307328 is an apocalyptic number.

It is an amenable number.

31144307328 is an abundant number, since it is smaller than the sum of its proper divisors (63944580672).

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

31144307328 is a wasteful number, since it uses less digits than its factorization.

31144307328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310799 (or 310781 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The spelling of 31144307328 in words is "thirty-one billion, one hundred forty-four million, three hundred seven thousand, three hundred twenty-eight".