399226572 has 36 divisors (see below), whose sum is σ = 1068519816. Its totient is φ = 125247360.

The previous prime is 399226567. The next prime is 399226591. The reversal of 399226572 is 275622993.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 325554 + ... + 326777.

It is an arithmetic number, because the mean of its divisors is an integer number (29681106).

Almost surely, 2^399226572 is an apocalyptic number.

It is an amenable number.

399226572 is an abundant number, since it is smaller than the sum of its proper divisors (669293244).

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

399226572 is a wasteful number, since it uses less digits than its factorization.

399226572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652358 (or 652353 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 399226572 is about 19980.6549442204. The cubic root of 399226572 is about 736.3311044696.

The spelling of 399226572 in words is "three hundred ninety-nine million, two hundred twenty-six thousand, five hundred seventy-two".