399380260 has 24 divisors (see below), whose sum is σ = 847006776. Its totient is φ = 158169600.

The previous prime is 399380249. The next prime is 399380273. The reversal of 399380260 is 62083993.

It can be written as a sum of positive squares in 4 ways, for example, as 98843364 + 300536896 = 9942^2 + 17336^2 .

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, 96837 + ... + 100876.

It is an arithmetic number, because the mean of its divisors is an integer number (35291949).

Almost surely, 2^399380260 is an apocalyptic number.

It is an amenable number.

399380260 is an abundant number, since it is smaller than the sum of its proper divisors (447626516).

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

399380260 is a wasteful number, since it uses less digits than its factorization.

399380260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197823 (or 197821 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 399380260 is about 19984.5004941329. The cubic root of 399380260 is about 736.4255794238.

The spelling of 399380260 in words is "three hundred ninety-nine million, three hundred eighty thousand, two hundred sixty".