399544288 has 48 divisors (see below), whose sum is σ = 924131376. Its totient is φ = 167639040.

The previous prime is 399544273. The next prime is 399544291. The reversal of 399544288 is 882445993.

It is a Harshad number since it is a multiple of its sum of digits (52).

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, 39081 + ... + 48232.

It is an arithmetic number, because the mean of its divisors is an integer number (19252737).

Almost surely, 2^399544288 is an apocalyptic number.

It is an amenable number.

399544288 is an abundant number, since it is smaller than the sum of its proper divisors (524587088).

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

399544288 is a wasteful number, since it uses less digits than its factorization.

399544288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87347 (or 87339 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 52.

The square root of 399544288 is about 19988.6039532530. The cubic root of 399544288 is about 736.5263838399.

The spelling of 399544288 in words is "three hundred ninety-nine million, five hundred forty-four thousand, two hundred eighty-eight".