399939622 has 8 divisors (see below), whose sum is σ = 599999400. Its totient is φ = 199939824.

The previous prime is 399939577. The next prime is 399939647. The reversal of 399939622 is 226939993.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 399939622.

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, 10029 + ... + 30007.

It is an arithmetic number, because the mean of its divisors is an integer number (74999925).

Almost surely, 2^399939622 is an apocalyptic number.

399939622 is a deficient number, since it is larger than the sum of its proper divisors (200059778).

399939622 is a wasteful number, since it uses less digits than its factorization.

399939622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29990.

The product of its digits is 1417176, while the sum is 52.

The square root of 399939622 is about 19998.4904930347. The cubic root of 399939622 is about 736.7692254537.

The spelling of 399939622 in words is "three hundred ninety-nine million, nine hundred thirty-nine thousand, six hundred twenty-two".