399875380 has 24 divisors (see below), whose sum is σ = 840726432. Its totient is φ = 159761952.

The previous prime is 399875351. The next prime is 399875383. The reversal of 399875380 is 83578993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399875383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6339 + ... + 28981.

It is an arithmetic number, because the mean of its divisors is an integer number (35030268).

Almost surely, 2^399875380 is an apocalyptic number.

It is an amenable number.

399875380 is an abundant number, since it is smaller than the sum of its proper divisors (440851052).

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

399875380 is a wasteful number, since it uses less digits than its factorization.

399875380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23535 (or 23533 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 52.

The square root of 399875380 is about 19996.8842573037. The cubic root of 399875380 is about 736.7297744461.

The spelling of 399875380 in words is "three hundred ninety-nine million, eight hundred seventy-five thousand, three hundred eighty".