399160216 has 128 divisors (see below), whose sum is σ = 993484800. Its totient is φ = 145981440.

The previous prime is 399160199. The next prime is 399160231. The reversal of 399160216 is 612061993.

It is a congruent number.

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, 518680 + ... + 519448.

It is an arithmetic number, because the mean of its divisors is an integer number (7761600).

Almost surely, 2^399160216 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 399160216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (496742400).

399160216 is an abundant number, since it is smaller than the sum of its proper divisors (594324584).

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

399160216 is a wasteful number, since it uses less digits than its factorization.

399160216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849 (or 845 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 399160216 is about 19978.9943690867. The cubic root of 399160216 is about 736.2903066725.

The spelling of 399160216 in words is "three hundred ninety-nine million, one hundred sixty thousand, two hundred sixteen".