399760422 has 16 divisors (see below), whose sum is σ = 818114880. Its totient is φ = 130154472.

The previous prime is 399760409. The next prime is 399760429. The reversal of 399760422 is 224067993.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399760429) 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, 774472 + ... + 774987.

It is an arithmetic number, because the mean of its divisors is an integer number (51132180).

Almost surely, 2^399760422 is an apocalyptic number.

399760422 is an abundant number, since it is smaller than the sum of its proper divisors (418354458).

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

399760422 is a wasteful number, since it uses less digits than its factorization.

399760422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1549507.

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 399760422 is about 19994.0096528935. The cubic root of 399760422 is about 736.6591681999.

The spelling of 399760422 in words is "three hundred ninety-nine million, seven hundred sixty thousand, four hundred twenty-two".