399651422 has 8 divisors (see below), whose sum is σ = 600429072. Its totient is φ = 199508400.

The previous prime is 399651383. The next prime is 399651431. The reversal of 399651422 is 224156993.

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 399651422.

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, 157079 + ... + 159602.

It is an arithmetic number, because the mean of its divisors is an integer number (75053634).

Almost surely, 2^399651422 is an apocalyptic number.

399651422 is a deficient number, since it is larger than the sum of its proper divisors (200777650).

399651422 is a wasteful number, since it uses less digits than its factorization.

399651422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317314.

The product of its digits is 116640, while the sum is 41.

The square root of 399651422 is about 19991.2836506313. The cubic root of 399651422 is about 736.5922088046.

The spelling of 399651422 in words is "three hundred ninety-nine million, six hundred fifty-one thousand, four hundred twenty-two".