399886065 has 80 divisors (see below), whose sum is σ = 761661120. Its totient is φ = 200154240.

The previous prime is 399886063. The next prime is 399886093. The reversal of 399886065 is 560688993.

It is not a de Polignac number, because 399886065 - 2¹ = 399886063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399886061) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1207950 + ... + 1208280.

It is an arithmetic number, because the mean of its divisors is an integer number (9520764).

Almost surely, 2^399886065 is an apocalyptic number.

It is an amenable number.

399886065 is a deficient number, since it is larger than the sum of its proper divisors (361775055).

399886065 is a wasteful number, since it uses less digits than its factorization.

399886065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524 (or 515 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The square root of 399886065 is about 19997.1514221401. The cubic root of 399886065 is about 736.7363363968.

The spelling of 399886065 in words is "three hundred ninety-nine million, eight hundred eighty-six thousand, sixty-five".