31138584328 has 16 divisors (see below), whose sum is σ = 58388003280. Its totient is φ = 15568450128.

The previous prime is 31138584313. The next prime is 31138584329. The reversal of 31138584328 is 82348583113.

It is a super-2 number, since 2×31138584328² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31138584329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68851 + ... + 258877.

It is an arithmetic number, because the mean of its divisors is an integer number (3649250205).

Almost surely, 2^31138584328 is an apocalyptic number.

It is an amenable number.

31138584328 is a deficient number, since it is larger than the sum of its proper divisors (27249418952).

31138584328 is a wasteful number, since it uses less digits than its factorization.

31138584328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210516 (or 210512 counting only the distinct ones).

The product of its digits is 552960, while the sum is 46.

The spelling of 31138584328 in words is "thirty-one billion, one hundred thirty-eight million, five hundred eighty-four thousand, three hundred twenty-eight".