399932255 has 4 divisors (see below), whose sum is σ = 479918712. Its totient is φ = 319945800.

The previous prime is 399932237. The next prime is 399932317. The reversal of 399932255 is 552239993.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 399932255 - 2²⁴ = 383155039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39993221 + ... + 39993230.

It is an arithmetic number, because the mean of its divisors is an integer number (119979678).

Almost surely, 2^399932255 is an apocalyptic number.

399932255 is a deficient number, since it is larger than the sum of its proper divisors (79986457).

399932255 is an equidigital number, since it uses as much as digits as its factorization.

399932255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79986456.

The product of its digits is 656100, while the sum is 47.

The square root of 399932255 is about 19998.3063032848. The cubic root of 399932255 is about 736.7647015940.

The spelling of 399932255 in words is "three hundred ninety-nine million, nine hundred thirty-two thousand, two hundred fifty-five".