399337970 has 16 divisors (see below), whose sum is σ = 741996288. Its totient is φ = 154582320.

The previous prime is 399337931. The next prime is 399337979. The reversal of 399337970 is 79733993.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (399337979) 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, 643784 + ... + 644403.

It is an arithmetic number, because the mean of its divisors is an integer number (46374768).

Almost surely, 2^399337970 is an apocalyptic number.

399337970 is a deficient number, since it is larger than the sum of its proper divisors (342658318).

399337970 is a wasteful number, since it uses less digits than its factorization.

399337970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288225.

The product of its (nonzero) digits is 964467, while the sum is 50.

The square root of 399337970 is about 19983.4423961439. The cubic root of 399337970 is about 736.3995853691.

The spelling of 399337970 in words is "three hundred ninety-nine million, three hundred thirty-seven thousand, nine hundred seventy".