399226580 has 12 divisors (see below), whose sum is σ = 838375860. Its totient is φ = 159690624.

The previous prime is 399226567. The next prime is 399226591. The reversal of 399226580 is 85622993.

It can be written as a sum of positive squares in 2 ways, for example, as 80532676 + 318693904 = 8974^2 + 17852^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9980645 + ... + 9980684.

It is an arithmetic number, because the mean of its divisors is an integer number (69864655).

Almost surely, 2^399226580 is an apocalyptic number.

It is an amenable number.

399226580 is an abundant number, since it is smaller than the sum of its proper divisors (439149280).

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

399226580 is a wasteful number, since it uses less digits than its factorization.

399226580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19961338 (or 19961336 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 399226580 is about 19980.6551444141. The cubic root of 399226580 is about 736.3311093880.

The spelling of 399226580 in words is "three hundred ninety-nine million, two hundred twenty-six thousand, five hundred eighty".