399377867 has 16 divisors (see below), whose sum is σ = 472320000. Its totient is φ = 330462720.

The previous prime is 399377863. The next prime is 399377887. The reversal of 399377867 is 768773993.

It is not a de Polignac number, because 399377867 - 2² = 399377863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399377863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95384 + ... + 99482.

It is an arithmetic number, because the mean of its divisors is an integer number (29520000).

Almost surely, 2^399377867 is an apocalyptic number.

399377867 is a deficient number, since it is larger than the sum of its proper divisors (72942133).

399377867 is a wasteful number, since it uses less digits than its factorization.

399377867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4586.

The product of its digits is 12002256, while the sum is 59.

The square root of 399377867 is about 19984.4406226444. The cubic root of 399377867 is about 736.4241085867.

The spelling of 399377867 in words is "three hundred ninety-nine million, three hundred seventy-seven thousand, eight hundred sixty-seven".