399406204 has 6 divisors (see below), whose sum is σ = 698960864. Its totient is φ = 199703100.

The previous prime is 399406199. The next prime is 399406207. The reversal of 399406204 is 402604993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399406207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49925772 + ... + 49925779.

Almost surely, 2^399406204 is an apocalyptic number.

It is an amenable number.

399406204 is a deficient number, since it is larger than the sum of its proper divisors (299554660).

399406204 is a wasteful number, since it uses less digits than its factorization.

399406204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99851555 (or 99851553 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 399406204 is about 19985.1495866306. The cubic root of 399406204 is about 736.4415253059.

The spelling of 399406204 in words is "three hundred ninety-nine million, four hundred six thousand, two hundred four".