399889822208 has 30 divisors (see below), whose sum is σ = 799027200411. Its totient is φ = 199937756672.

The previous prime is 399889822159. The next prime is 399889822229. The reversal of 399889822208 is 802228988993.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 199944911104 + 199944911104 = 447152^2 + 447152^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=447152.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 14294891 + ... + 14322837.

Almost surely, 2^399889822208 is an apocalyptic number.

It is an amenable number.

399889822208 is a deficient number, since it is larger than the sum of its proper divisors (399137378203).

399889822208 is an frugal number, since it uses more digits than its factorization.

399889822208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55912 (or 27949 counting only the distinct ones).

The product of its (nonzero) digits is 71663616, while the sum is 68.

The spelling of 399889822208 in words is "three hundred ninety-nine billion, eight hundred eighty-nine million, eight hundred twenty-two thousand, two hundred eight".