399766224 has 160 divisors (see below), whose sum is σ = 1224921600. Its totient is φ = 110753280.

The previous prime is 399766223. The next prime is 399766229. The reversal of 399766224 is 422667993.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399766223) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 953887 + ... + 954305.

It is an arithmetic number, because the mean of its divisors is an integer number (7655760).

Almost surely, 2^399766224 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 399766224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (612460800).

399766224 is an abundant number, since it is smaller than the sum of its proper divisors (825155376).

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

399766224 is a wasteful number, since it uses less digits than its factorization.

399766224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593 (or 587 counting only the distinct ones).

The product of its digits is 979776, while the sum is 48.

The square root of 399766224 is about 19994.1547458251. The cubic root of 399766224 is about 736.6627320643.

The spelling of 399766224 in words is "three hundred ninety-nine million, seven hundred sixty-six thousand, two hundred twenty-four".