399377895 has 16 divisors (see below), whose sum is σ = 730291200. Its totient is φ = 182572704.

The previous prime is 399377887. The next prime is 399377921. The reversal of 399377895 is 598773993.

It is not a de Polignac number, because 399377895 - 2³ = 399377887 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1901695 + ... + 1901904.

It is an arithmetic number, because the mean of its divisors is an integer number (45643200).

Almost surely, 2^399377895 is an apocalyptic number.

399377895 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

399377895 is a deficient number, since it is larger than the sum of its proper divisors (330913305).

399377895 is a wasteful number, since it uses less digits than its factorization.

399377895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3803614.

The product of its digits is 12859560, while the sum is 60.

The square root of 399377895 is about 19984.4413231894. The cubic root of 399377895 is about 736.4241257967.

The spelling of 399377895 in words is "three hundred ninety-nine million, three hundred seventy-seven thousand, eight hundred ninety-five".