398626999 has 8 divisors (see below), whose sum is σ = 422895168. Its totient is φ = 374449920.

The previous prime is 398626993. The next prime is 398627023. The reversal of 398626999 is 999626893.

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

It is a cyclic number.

It is not a de Polignac number, because 398626999 - 2⁵ = 398626967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398626993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13647 + ... + 31360.

It is an arithmetic number, because the mean of its divisors is an integer number (52861896).

Almost surely, 2^398626999 is an apocalyptic number.

398626999 is a deficient number, since it is larger than the sum of its proper divisors (24268169).

398626999 is a wasteful number, since it uses less digits than its factorization.

398626999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45545.

The product of its digits is 11337408, while the sum is 61.

The square root of 398626999 is about 19965.6454691553. The cubic root of 398626999 is about 735.9623034952.

The spelling of 398626999 in words is "three hundred ninety-eight million, six hundred twenty-six thousand, nine hundred ninety-nine".