398740233 has 8 divisors (see below), whose sum is σ = 531828000. Its totient is φ = 265739648.

The previous prime is 398740229. The next prime is 398740283. The reversal of 398740233 is 332047893.

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 398740233 - 2² = 398740229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 398740191 and 398740200.

It is not an unprimeable number, because it can be changed into a prime (398740283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10248 + ... + 30041.

It is an arithmetic number, because the mean of its divisors is an integer number (66478500).

Almost surely, 2^398740233 is an apocalyptic number.

It is an amenable number.

398740233 is a deficient number, since it is larger than the sum of its proper divisors (133087767).

398740233 is a wasteful number, since it uses less digits than its factorization.

398740233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43591.

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 398740233 is about 19968.4809887983. The cubic root of 398740233 is about 736.0319827243.

The spelling of 398740233 in words is "three hundred ninety-eight million, seven hundred forty thousand, two hundred thirty-three".