399819368 has 32 divisors (see below), whose sum is σ = 813711360. Its totient is φ = 183072960.

The previous prime is 399819361. The next prime is 399819421. The reversal of 399819368 is 863918993.

It is not an unprimeable number, because it can be changed into a prime (399819361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1928 + ... + 28343.

It is an arithmetic number, because the mean of its divisors is an integer number (25428480).

Almost surely, 2^399819368 is an apocalyptic number.

It is an amenable number.

399819368 is an abundant number, since it is smaller than the sum of its proper divisors (413891992).

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

399819368 is a wasteful number, since it uses less digits than its factorization.

399819368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30417 (or 30413 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 56.

The square root of 399819368 is about 19995.4836900736. The cubic root of 399819368 is about 736.6953740328.

The spelling of 399819368 in words is "three hundred ninety-nine million, eight hundred nineteen thousand, three hundred sixty-eight".