399224423 has 8 divisors (see below), whose sum is σ = 430183488. Its totient is φ = 368301024.

The previous prime is 399224401. The next prime is 399224431. The reversal of 399224423 is 324422993.

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

It is not a de Polignac number, because 399224423 - 2⁶ = 399224359 is a prime.

It is a super-3 number, since 3×399224423³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399224323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17186 + ... + 33072.

It is an arithmetic number, because the mean of its divisors is an integer number (53772936).

Almost surely, 2^399224423 is an apocalyptic number.

399224423 is a deficient number, since it is larger than the sum of its proper divisors (30959065).

399224423 is a wasteful number, since it uses less digits than its factorization.

399224423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17833.

The product of its digits is 93312, while the sum is 38.

The square root of 399224423 is about 19980.6011671321. The cubic root of 399224423 is about 736.3297832663.

The spelling of 399224423 in words is "three hundred ninety-nine million, two hundred twenty-four thousand, four hundred twenty-three".