399603894 has 16 divisors (see below), whose sum is σ = 799450560. Its totient is φ = 133160840.

The previous prime is 399603889. The next prime is 399603943. The reversal of 399603894 is 498306993.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16789 + ... + 32879.

It is an arithmetic number, because the mean of its divisors is an integer number (49965660).

Almost surely, 2^399603894 is an apocalyptic number.

399603894 is an abundant number, since it is smaller than the sum of its proper divisors (399846666).

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

399603894 is a wasteful number, since it uses less digits than its factorization.

399603894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20235.

The product of its (nonzero) digits is 1259712, while the sum is 51.

The square root of 399603894 is about 19990.0948972235. The cubic root of 399603894 is about 736.5630082392.

The spelling of 399603894 in words is "three hundred ninety-nine million, six hundred three thousand, eight hundred ninety-four".