399552160 has 144 divisors (see below), whose sum is σ = 1108187136. Its totient is φ = 133346304.

The previous prime is 399552157. The next prime is 399552161. The reversal of 399552160 is 61255993.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399552161) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3146017 + ... + 3146143.

It is an arithmetic number, because the mean of its divisors is an integer number (7695744).

Almost surely, 2^399552160 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 399552160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (554093568).

399552160 is an abundant number, since it is smaller than the sum of its proper divisors (708634976).

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

399552160 is a wasteful number, since it uses less digits than its factorization.

399552160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 72900, while the sum is 40.

The square root of 399552160 is about 19988.8008644841. The cubic root of 399552160 is about 736.5312209321.

The spelling of 399552160 in words is "three hundred ninety-nine million, five hundred fifty-two thousand, one hundred sixty".