39861998 has 24 divisors (see below), whose sum is σ = 66291456. Its totient is φ = 17962560.

The previous prime is 39861977. The next prime is 39862007. The reversal of 39861998 is 89916893.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30086 + ... + 31382.

It is an arithmetic number, because the mean of its divisors is an integer number (2762144).

Almost surely, 2^39861998 is an apocalyptic number.

39861998 is a deficient number, since it is larger than the sum of its proper divisors (26429458).

39861998 is a wasteful number, since it uses less digits than its factorization.

39861998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448 (or 1437 counting only the distinct ones).

The product of its digits is 839808, while the sum is 53.

The square root of 39861998 is about 6313.6358780025. The cubic root of 39861998 is about 341.6014359970.

The spelling of 39861998 in words is "thirty-nine million, eight hundred sixty-one thousand, nine hundred ninety-eight".