399492576 has 144 divisors (see below), whose sum is σ = 1317109248. Its totient is φ = 112492800.

The previous prime is 399492539. The next prime is 399492601. The reversal of 399492576 is 675294993.

It is a tau number, because it is divible by the number of its divisors (144).

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 23 ways as a sum of consecutive naturals, for example, 141741 + ... + 144531.

It is an arithmetic number, because the mean of its divisors is an integer number (9146592).

Almost surely, 2^399492576 is an apocalyptic number.

399492576 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399492576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (658554624).

399492576 is an abundant number, since it is smaller than the sum of its proper divisors (917616672).

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

399492576 is a wasteful number, since it uses less digits than its factorization.

399492576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2885 (or 2874 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 54.

The square root of 399492576 is about 19987.3103743350. The cubic root of 399492576 is about 736.4946068907.

The spelling of 399492576 in words is "three hundred ninety-nine million, four hundred ninety-two thousand, five hundred seventy-six".