399039798 has 32 divisors (see below), whose sum is σ = 819699552. Its totient is φ = 129427200.

The previous prime is 399039769. The next prime is 399039799. The reversal of 399039798 is 897930993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399039799) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 101640 + ... + 105492.

It is an arithmetic number, because the mean of its divisors is an integer number (25615611).

Almost surely, 2^399039798 is an apocalyptic number.

399039798 is an abundant number, since it is smaller than the sum of its proper divisors (420659754).

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

399039798 is a wasteful number, since it uses less digits than its factorization.

399039798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4320.

The product of its (nonzero) digits is 3306744, while the sum is 57.

The square root of 399039798 is about 19975.9805266225. The cubic root of 399039798 is about 736.2162582746.

The spelling of 399039798 in words is "three hundred ninety-nine million, thirty-nine thousand, seven hundred ninety-eight".