398888933 has 8 divisors (see below), whose sum is σ = 405984000. Its totient is φ = 391845168.

The previous prime is 398888921. The next prime is 398888947. The reversal of 398888933 is 339888893.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398888933 is a prime.

It is a super-2 number, since 2×398888933² = 318224761739756978, which contains 22 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 (398888993) 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, 3035 + ... + 28407.

It is an arithmetic number, because the mean of its divisors is an integer number (50748000).

Almost surely, 2^398888933 is an apocalyptic number.

It is an amenable number.

398888933 is a deficient number, since it is larger than the sum of its proper divisors (7095067).

398888933 is a wasteful number, since it uses less digits than its factorization.

398888933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25651.

The product of its digits is 8957952, while the sum is 59.

The square root of 398888933 is about 19972.2040095729. The cubic root of 398888933 is about 736.1234661382.

The spelling of 398888933 in words is "three hundred ninety-eight million, eight hundred eighty-eight thousand, nine hundred thirty-three".