399364705 has 16 divisors (see below), whose sum is σ = 511574400. Its totient is φ = 298408320.

The previous prime is 399364703. The next prime is 399364751. The reversal of 399364705 is 507463993.

It is not a de Polignac number, because 399364705 - 2¹ = 399364703 is a prime.

It is not an unprimeable number, because it can be changed into a prime (399364703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22860 + ... + 36349.

It is an arithmetic number, because the mean of its divisors is an integer number (31973400).

Almost surely, 2^399364705 is an apocalyptic number.

It is an amenable number.

399364705 is a deficient number, since it is larger than the sum of its proper divisors (112209695).

399364705 is a wasteful number, since it uses less digits than its factorization.

399364705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59304.

The product of its (nonzero) digits is 612360, while the sum is 46.

The square root of 399364705 is about 19984.1113137412. Note that the first 3 decimals coincide. The cubic root of 399364705 is about 736.4160185702.

The spelling of 399364705 in words is "three hundred ninety-nine million, three hundred sixty-four thousand, seven hundred five".