398722623 has 16 divisors (see below), whose sum is σ = 575533056. Its totient is φ = 244078560.

The previous prime is 398722609. The next prime is 398722627. The reversal of 398722623 is 326227893.

It is not a de Polignac number, because 398722623 - 2⁵ = 398722591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398722627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19315 + ... + 34212.

It is an arithmetic number, because the mean of its divisors is an integer number (35970816).

Almost surely, 2^398722623 is an apocalyptic number.

398722623 is a deficient number, since it is larger than the sum of its proper divisors (176810433).

398722623 is a wasteful number, since it uses less digits than its factorization.

398722623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53734.

The product of its digits is 217728, while the sum is 42.

The square root of 398722623 is about 19968.0400390224. The cubic root of 398722623 is about 736.0211471702.

The spelling of 398722623 in words is "three hundred ninety-eight million, seven hundred twenty-two thousand, six hundred twenty-three".