3921082568 has 60 divisors (see below), whose sum is σ = 8025940695. Its totient is φ = 1795915680.

The previous prime is 3921082559. The next prime is 3921082579. The reversal of 3921082568 is 8652801293.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 3 ways, for example, as 68644 + 3921013924 = 262^2 + 62618^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=44278.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 29931863 + ... + 29931993.

Almost surely, 2^3921082568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3921082568

3921082568 is an abundant number, since it is smaller than the sum of its proper divisors (4104858127).

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

3921082568 is an frugal number, since it uses more digits than its factorization.

3921082568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 3921082568 is about 62618.5481147559. The cubic root of 3921082568 is about 1576.8921668705.

The spelling of 3921082568 in words is "three billion, nine hundred twenty-one million, eighty-two thousand, five hundred sixty-eight".