3999375624 has 16 divisors (see below), whose sum is σ = 9998439120. Its totient is φ = 1333125200.

The previous prime is 3999375617. The next prime is 3999375629. The reversal of 3999375624 is 4265739993.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (3999375629) 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 3 ways as a sum of consecutive naturals, for example, 83320302 + ... + 83320349.

It is an arithmetic number, because the mean of its divisors is an integer number (624902445).

Almost surely, 2^3999375624 is an apocalyptic number.

It is an amenable number.

3999375624 is an abundant number, since it is smaller than the sum of its proper divisors (5999063496).

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

3999375624 is a wasteful number, since it uses less digits than its factorization.

3999375624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166640660 (or 166640656 counting only the distinct ones).

The product of its digits is 11022480, while the sum is 57.

The square root of 3999375624 is about 63240.6168850368. The cubic root of 3999375624 is about 1587.3184530771.

The spelling of 3999375624 in words is "three billion, nine hundred ninety-nine million, three hundred seventy-five thousand, six hundred twenty-four".