399497418 has 24 divisors (see below), whose sum is σ = 879769956. Its totient is φ = 130982400.

The previous prime is 399497383. The next prime is 399497429. The reversal of 399497418 is 814794993.

It can be written as a sum of positive squares in 2 ways, for example, as 262537209 + 136960209 = 16203^2 + 11703^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 180823 + ... + 183018.

Almost surely, 2^399497418 is an apocalyptic number.

399497418 is an abundant number, since it is smaller than the sum of its proper divisors (480272538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

399497418 is a wasteful number, since it uses less digits than its factorization.

399497418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363910 (or 363907 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 399497418 is about 19987.4315008207. The cubic root of 399497418 is about 736.4975824090.

The spelling of 399497418 in words is "three hundred ninety-nine million, four hundred ninety-seven thousand, four hundred eighteen".