399469568 has 22 divisors (see below), whose sum is σ = 798551076. Its totient is φ = 199734272.

The previous prime is 399469561. The next prime is 399469579. The reversal of 399469568 is 865964993.

It is not an unprimeable number, because it can be changed into a prime (399469561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194030 + ... + 196077.

Almost surely, 2^399469568 is an apocalyptic number.

It is an amenable number.

399469568 is a deficient number, since it is larger than the sum of its proper divisors (399081508).

399469568 is an equidigital number, since it uses as much as digits as its factorization.

399469568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390127 (or 390109 counting only the distinct ones).

The product of its digits is 12597120, while the sum is 59.

The square root of 399469568 is about 19986.7348008623. The cubic root of 399469568 is about 736.4804676265.

The spelling of 399469568 in words is "three hundred ninety-nine million, four hundred sixty-nine thousand, five hundred sixty-eight".