39999988 has 12 divisors (see below), whose sum is σ = 80000032. Its totient is φ = 17142840.

The previous prime is 39999983. The next prime is 40000003. The reversal of 39999988 is 88999993.

39999988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

39999988 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39999983) 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, 714258 + ... + 714313.

Almost surely, 2^39999988 is an apocalyptic number.

It is an amenable number.

39999988 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

39999988 is a wasteful number, since it uses less digits than its factorization.

39999988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1428582 (or 1428580 counting only the distinct ones).

The product of its digits is 11337408, while the sum is 64.

The square root of 39999988 is about 6324.5543716534. The cubic root of 39999988 is about 341.9951551358.

The spelling of 39999988 in words is "thirty-nine million, nine hundred ninety-nine thousand, nine hundred eighty-eight".