39940024 has 16 divisors (see below), whose sum is σ = 74955600. Its totient is φ = 19951872.

The previous prime is 39940009. The next prime is 39940031. The reversal of 39940024 is 42004993.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13704 + ... + 16360.

It is an arithmetic number, because the mean of its divisors is an integer number (4684725).

Almost surely, 2^39940024 is an apocalyptic number.

It is an amenable number.

39940024 is a deficient number, since it is larger than the sum of its proper divisors (35015576).

39940024 is a wasteful number, since it uses less digits than its factorization.

39940024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4542 (or 4538 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 39940024 is about 6319.8120225209. The cubic root of 39940024 is about 341.8241746381.

Subtracting 39940024 from its reverse (42004993), we obtain a square (2064969 = 1437²).

It can be divided in two parts, 399400 and 24, that added together give a square (399424 = 632²).

The spelling of 39940024 in words is "thirty-nine million, nine hundred forty thousand, twenty-four".