39961868 has 6 divisors (see below), whose sum is σ = 69933276. Its totient is φ = 19980932.

The previous prime is 39961829. The next prime is 39961871. The reversal of 39961868 is 86816993.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4995230 + ... + 4995237.

It is an arithmetic number, because the mean of its divisors is an integer number (11655546).

Almost surely, 2^39961868 is an apocalyptic number.

It is an amenable number.

39961868 is a deficient number, since it is larger than the sum of its proper divisors (29971408).

39961868 is a wasteful number, since it uses less digits than its factorization.

39961868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9990471 (or 9990469 counting only the distinct ones).

The product of its digits is 559872, while the sum is 50.

The square root of 39961868 is about 6321.5400022463. The cubic root of 39961868 is about 341.8864801125.

The spelling of 39961868 in words is "thirty-nine million, nine hundred sixty-one thousand, eight hundred sixty-eight".