399074770 has 16 divisors (see below), whose sum is σ = 718633368. Its totient is φ = 159563520.

The previous prime is 399074747. The next prime is 399074777. The reversal of 399074770 is 77470993.

It can be written as a sum of positive squares in 4 ways, for example, as 387026929 + 12047841 = 19673^2 + 3471^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 399074770.

It is not an unprimeable number, because it can be changed into a prime (399074777) 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, 22330 + ... + 36010.

Almost surely, 2^399074770 is an apocalyptic number.

399074770 is a deficient number, since it is larger than the sum of its proper divisors (319558598).

399074770 is a wasteful number, since it uses less digits than its factorization.

399074770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16605.

The product of its (nonzero) digits is 333396, while the sum is 46.

The square root of 399074770 is about 19976.8558587181. The cubic root of 399074770 is about 736.2377650708.

The spelling of 399074770 in words is "three hundred ninety-nine million, seventy-four thousand, seven hundred seventy".