3856999924 has 24 divisors (see below), whose sum is σ = 7108788960. Its totient is φ = 1826025696.

The previous prime is 3856999897. The next prime is 3856999969. The reversal of 3856999924 is 4299996583.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141534 + ... + 166570.

It is an arithmetic number, because the mean of its divisors is an integer number (296199540).

Almost surely, 2^3856999924 is an apocalyptic number.

It is an amenable number.

3856999924 is a deficient number, since it is larger than the sum of its proper divisors (3251789036).

3856999924 is a wasteful number, since it uses less digits than its factorization.

3856999924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27087 (or 27085 counting only the distinct ones).

The product of its digits is 37791360, while the sum is 64.

The square root of 3856999924 is about 62104.7496090275. The cubic root of 3856999924 is about 1568.2545037787.

The spelling of 3856999924 in words is "three billion, eight hundred fifty-six million, nine hundred ninety-nine thousand, nine hundred twenty-four".