3957315840 has 108 divisors (see below), whose sum is σ = 13691940444. Its totient is φ = 1055281152.

The previous prime is 3957315827. The next prime is 3957315863. The reversal of 3957315840 is 485137593.

3957315840 is a `hidden beast` number, since 39 + 5 + 7 + 31 + 584 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3105609984 + 851705856 = 55728^2 + 29184^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 160239 + ... + 183278.

Almost surely, 2^3957315840 is an apocalyptic number.

3957315840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3957315840 is an abundant number, since it is smaller than the sum of its proper divisors (9734624604).

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

3957315840 is a wasteful number, since it uses less digits than its factorization.

3957315840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343544 (or 343527 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The square root of 3957315840 is about 62907.2002238218. The cubic root of 3957315840 is about 1581.7344409962.

The spelling of 3957315840 in words is "three billion, nine hundred fifty-seven million, three hundred fifteen thousand, eight hundred forty".