399766312 has 64 divisors (see below), whose sum is σ = 857640960. Its totient is φ = 172920000.

The previous prime is 399766291. The next prime is 399766331. The reversal of 399766312 is 213667993.

It is a Harshad number since it is a multiple of its sum of digits (46).

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, 531937 + ... + 532687.

It is an arithmetic number, because the mean of its divisors is an integer number (13400640).

Almost surely, 2^399766312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399766312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (428820480).

399766312 is an abundant number, since it is smaller than the sum of its proper divisors (457874648).

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

399766312 is a wasteful number, since it uses less digits than its factorization.

399766312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054 (or 1050 counting only the distinct ones).

The product of its digits is 367416, while the sum is 46.

The square root of 399766312 is about 19994.1569464681. The cubic root of 399766312 is about 736.6627861178.

The spelling of 399766312 in words is "three hundred ninety-nine million, seven hundred sixty-six thousand, three hundred twelve".