39798865 has 16 divisors (see below), whose sum is σ = 50200128. Its totient is φ = 30252096.

The previous prime is 39798859. The next prime is 39798877. The reversal of 39798865 is 56889793.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 39798865 - 2²³ = 31410257 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5454 + ... + 10456.

It is an arithmetic number, because the mean of its divisors is an integer number (3137508).

Almost surely, 2^39798865 is an apocalyptic number.

It is an amenable number.

39798865 is a deficient number, since it is larger than the sum of its proper divisors (10401263).

39798865 is a wasteful number, since it uses less digits than its factorization.

39798865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5088.

The product of its digits is 3265920, while the sum is 55.

The square root of 39798865 is about 6308.6341627963. The cubic root of 39798865 is about 341.4209991560.

The spelling of 39798865 in words is "thirty-nine million, seven hundred ninety-eight thousand, eight hundred sixty-five".