399549422 has 8 divisors (see below), whose sum is σ = 625381776. Its totient is φ = 191088832.

The previous prime is 399549413. The next prime is 399549427. The reversal of 399549422 is 224945993.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399549427) 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 3 ways as a sum of consecutive naturals, for example, 4342883 + ... + 4342974.

It is an arithmetic number, because the mean of its divisors is an integer number (78172722).

Almost surely, 2^399549422 is an apocalyptic number.

399549422 is a deficient number, since it is larger than the sum of its proper divisors (225832354).

399549422 is a wasteful number, since it uses less digits than its factorization.

399549422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8685882.

The product of its digits is 699840, while the sum is 47.

The square root of 399549422 is about 19988.7323760162. The cubic root of 399549422 is about 736.5295385259.

The spelling of 399549422 in words is "three hundred ninety-nine million, five hundred forty-nine thousand, four hundred twenty-two".