399822641 has 8 divisors (see below), whose sum is σ = 403603200. Its totient is φ = 396060192.

The previous prime is 399822613. The next prime is 399822649. The reversal of 399822641 is 146228993.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-399822641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 399822592 and 399822601.

It is not an unprimeable number, because it can be changed into a prime (399822649) 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 7 ways as a sum of consecutive naturals, for example, 42056 + ... + 50678.

It is an arithmetic number, because the mean of its divisors is an integer number (50450400).

Almost surely, 2^399822641 is an apocalyptic number.

It is an amenable number.

399822641 is a deficient number, since it is larger than the sum of its proper divisors (3780559).

399822641 is a wasteful number, since it uses less digits than its factorization.

399822641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9055.

The product of its digits is 186624, while the sum is 44.

The square root of 399822641 is about 19995.5655333876. The cubic root of 399822641 is about 736.6973842718.

The spelling of 399822641 in words is "three hundred ninety-nine million, eight hundred twenty-two thousand, six hundred forty-one".