399632765 has 8 divisors (see below), whose sum is σ = 548067840. Its totient is φ = 274033872.

The previous prime is 399632759. The next prime is 399632767. The reversal of 399632765 is 567236993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 399632765 - 2⁸ = 399632509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399632767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5709005 + ... + 5709074.

It is an arithmetic number, because the mean of its divisors is an integer number (68508480).

Almost surely, 2^399632765 is an apocalyptic number.

399632765 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

399632765 is a deficient number, since it is larger than the sum of its proper divisors (148435075).

399632765 is a wasteful number, since it uses less digits than its factorization.

399632765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11418091.

The product of its digits is 1837080, while the sum is 50.

The square root of 399632765 is about 19990.8170168205. The cubic root of 399632765 is about 736.5807464702.

The spelling of 399632765 in words is "three hundred ninety-nine million, six hundred thirty-two thousand, seven hundred sixty-five".