399845260 has 12 divisors (see below), whose sum is σ = 839675088. Its totient is φ = 159938096.

The previous prime is 399845249. The next prime is 399845267. The reversal of 399845260 is 62548993.

It is a self number, because there is not a number n which added to its sum of digits gives 399845260.

It is not an unprimeable number, because it can be changed into a prime (399845267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9996112 + ... + 9996151.

It is an arithmetic number, because the mean of its divisors is an integer number (69972924).

Almost surely, 2^399845260 is an apocalyptic number.

It is an amenable number.

399845260 is an abundant number, since it is smaller than the sum of its proper divisors (439829828).

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

399845260 is a wasteful number, since it uses less digits than its factorization.

399845260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19992272 (or 19992270 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 46.

The square root of 399845260 is about 19996.1311257953. The cubic root of 399845260 is about 736.7112763014.

The spelling of 399845260 in words is "three hundred ninety-nine million, eight hundred forty-five thousand, two hundred sixty".