399605064 has 32 divisors (see below), whose sum is σ = 1007860320. Its totient is φ = 132022016.

The previous prime is 399605047. The next prime is 399605071. The reversal of 399605064 is 460506993.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70962 + ... + 76385.

It is an arithmetic number, because the mean of its divisors is an integer number (31495635).

Almost surely, 2^399605064 is an apocalyptic number.

It is an amenable number.

399605064 is an abundant number, since it is smaller than the sum of its proper divisors (608255256).

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

399605064 is a wasteful number, since it uses less digits than its factorization.

399605064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147469 (or 147465 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 42.

The square root of 399605064 is about 19990.1241616954. The cubic root of 399605064 is about 736.5637270993.

The spelling of 399605064 in words is "three hundred ninety-nine million, six hundred five thousand, sixty-four".