398722833 has 6 divisors (see below), whose sum is σ = 575932994. Its totient is φ = 265815216.

The previous prime is 398722813. The next prime is 398722853. The reversal of 398722833 is 338227893.

It is a happy number.

398722833 is a `hidden beast` number, since 398 + 7 + 228 + 33 = 666.

It is an interprime number because it is at equal distance from previous prime (398722813) and next prime (398722853).

It can be written as a sum of positive squares in only one way, i.e., 346406544 + 52316289 = 18612^2 + 7233^2 .

It is not a de Polignac number, because 398722833 - 2¹² = 398718737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (398722813) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22151260 + ... + 22151277.

Almost surely, 2^398722833 is an apocalyptic number.

It is an amenable number.

398722833 is a deficient number, since it is larger than the sum of its proper divisors (177210161).

398722833 is a wasteful number, since it uses less digits than its factorization.

398722833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44302543 (or 44302540 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 398722833 is about 19968.0452974246. The cubic root of 398722833 is about 736.0212763865.

The spelling of 398722833 in words is "three hundred ninety-eight million, seven hundred twenty-two thousand, eight hundred thirty-three".