398889933 has 32 divisors (see below), whose sum is σ = 619248000. Its totient is φ = 226250496.

The previous prime is 398889923. The next prime is 398889941. The reversal of 398889933 is 339988893.

It is not a de Polignac number, because 398889933 - 2¹⁰ = 398888909 is a prime.

It is a super-2 number, since 2×398889933² = 318226357297488978, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398889913) 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 31 ways as a sum of consecutive naturals, for example, 20143 + ... + 34691.

It is an arithmetic number, because the mean of its divisors is an integer number (19351500).

Almost surely, 2^398889933 is an apocalyptic number.

It is an amenable number.

398889933 is a deficient number, since it is larger than the sum of its proper divisors (220358067).

398889933 is a wasteful number, since it uses less digits than its factorization.

398889933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14621.

The product of its digits is 10077696, while the sum is 60.

The square root of 398889933 is about 19972.2290443506. The cubic root of 398889933 is about 736.1240812826.

The spelling of 398889933 in words is "three hundred ninety-eight million, eight hundred eighty-nine thousand, nine hundred thirty-three".