399990202 has 16 divisors (see below), whose sum is σ = 620353800. Its totient is φ = 193278528.

The previous prime is 399990167. The next prime is 399990203. The reversal of 399990202 is 202099993.

It can be written as a sum of positive squares in 4 ways, for example, as 383024041 + 16966161 = 19571^2 + 4119^2 .

It is not an unprimeable number, because it can be changed into a prime (399990203) 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, 7113 + ... + 29164.

Almost surely, 2^399990202 is an apocalyptic number.

399990202 is a deficient number, since it is larger than the sum of its proper divisors (220363598).

399990202 is a wasteful number, since it uses less digits than its factorization.

399990202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36465.

The product of its (nonzero) digits is 78732, while the sum is 43.

The square root of 399990202 is about 19999.7550485000. The cubic root of 399990202 is about 736.8002836555.

The spelling of 399990202 in words is "three hundred ninety-nine million, nine hundred ninety thousand, two hundred two".