3899921560 has 32 divisors (see below), whose sum is σ = 8796962160. Its totient is φ = 1556032896.

The previous prime is 3899921539. The next prime is 3899921563. The reversal of 3899921560 is 651299983.

It is a junction number, because it is equal to n+sod(n) for n = 3899921498 and 3899921507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3899921563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106914 + ... + 138673.

Almost surely, 2^3899921560 is an apocalyptic number.

It is an amenable number.

3899921560 is an abundant number, since it is smaller than the sum of its proper divisors (4897040600).

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

3899921560 is a wasteful number, since it uses less digits than its factorization.

3899921560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245995 (or 245991 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 52.

The square root of 3899921560 is about 62449.3519582069. The cubic root of 3899921560 is about 1574.0503636258.

The spelling of 3899921560 in words is "three billion, eight hundred ninety-nine million, nine hundred twenty-one thousand, five hundred sixty".