39865042 has 16 divisors (see below), whose sum is σ = 69930432. Its totient is φ = 16687440.

The previous prime is 39865031. The next prime is 39865043. The reversal of 39865042 is 24056893.

It is a junction number, because it is equal to n+sod(n) for n = 39864992 and 39865010.

It is not an unprimeable number, because it can be changed into a prime (39865043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32509 + ... + 33712.

It is an arithmetic number, because the mean of its divisors is an integer number (4370652).

Almost surely, 2^39865042 is an apocalyptic number.

39865042 is a deficient number, since it is larger than the sum of its proper divisors (30065390).

39865042 is a wasteful number, since it uses less digits than its factorization.

39865042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66273.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 39865042 is about 6313.8769389338. The cubic root of 39865042 is about 341.6101310646.

The spelling of 39865042 in words is "thirty-nine million, eight hundred sixty-five thousand, forty-two".