399488544 has 192 divisors, whose sum is σ = 1434343680. Its totient is φ = 105338880.

The previous prime is 399488527. The next prime is 399488563. The reversal of 399488544 is 445884993.

399488544 is a `hidden beast` number, since 3 + 9 + 94 + 8 + 8 + 544 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

Its product of digits (4976640) is a multiple of the sum of its prime factors (5120).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76084 + ... + 81164.

It is an arithmetic number, because the mean of its divisors is an integer number (7470540).

Almost surely, 2^399488544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399488544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (717171840).

399488544 is an abundant number, since it is smaller than the sum of its proper divisors (1034855136).

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

399488544 is a wasteful number, since it uses less digits than its factorization.

399488544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5120 (or 5106 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 54.

The square root of 399488544 is about 19987.2095100842. The cubic root of 399488544 is about 736.4921291173.

The spelling of 399488544 in words is "three hundred ninety-nine million, four hundred eighty-eight thousand, five hundred forty-four".