3128315940 has 72 divisors (see below), whose sum is σ = 9493848000. Its totient is φ = 833811264.

The previous prime is 3128315893. The next prime is 3128315959. The reversal of 3128315940 is 495138213.

3128315940 is a `hidden beast` number, since 31 + 2 + 8 + 31 + 594 + 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 = 3128315895 and 3128315904.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 627337 + ... + 632303.

It is an arithmetic number, because the mean of its divisors is an integer number (131859000).

Almost surely, 2^3128315940 is an apocalyptic number.

3128315940 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3128315940 is an abundant number, since it is smaller than the sum of its proper divisors (6365532060).

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

3128315940 is a wasteful number, since it uses less digits than its factorization.

3128315940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8481 (or 8476 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 3128315940 is about 55931.3502429541. The cubic root of 3128315940 is about 1462.5257992381.

The spelling of 3128315940 in words is "three billion, one hundred twenty-eight million, three hundred fifteen thousand, nine hundred forty".