3899857920 has 704 divisors, whose sum is σ = 15846727680. Its totient is φ = 798031872.

The previous prime is 3899857909. The next prime is 3899857963. The reversal of 3899857920 is 297589983.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 46986199 + ... + 46986281.

Almost surely, 2^3899857920 is an apocalyptic number.

3899857920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3899857920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7923363840).

3899857920 is an abundant number, since it is smaller than the sum of its proper divisors (11946869760).

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

3899857920 is a wasteful number, since it uses less digits than its factorization.

3899857920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 60.

The square root of 3899857920 is about 62448.8424232187. The cubic root of 3899857920 is about 1574.0418016493.

The spelling of 3899857920 in words is "three billion, eight hundred ninety-nine million, eight hundred fifty-seven thousand, nine hundred twenty".