399604238 has 16 divisors (see below), whose sum is σ = 688314240. Its totient is φ = 172078200.

The previous prime is 399604213. The next prime is 399604301. The reversal of 399604238 is 832406993.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 477578 + ... + 478413.

It is an arithmetic number, because the mean of its divisors is an integer number (43019640).

Almost surely, 2^399604238 is an apocalyptic number.

399604238 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

399604238 is a deficient number, since it is larger than the sum of its proper divisors (288710002).

399604238 is a wasteful number, since it uses less digits than its factorization.

399604238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956023.

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 399604238 is about 19990.1035014829. The cubic root of 399604238 is about 736.5632195965.

The spelling of 399604238 in words is "three hundred ninety-nine million, six hundred four thousand, two hundred thirty-eight".