398958433 has 4 divisors (see below), whose sum is σ = 399237120. Its totient is φ = 398679748.

The previous prime is 398958407. The next prime is 398958451. The reversal of 398958433 is 334859893.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398958433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398958493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137185 + ... + 140062.

It is an arithmetic number, because the mean of its divisors is an integer number (99809280).

Almost surely, 2^398958433 is an apocalyptic number.

It is an amenable number.

398958433 is a deficient number, since it is larger than the sum of its proper divisors (278687).

398958433 is a wasteful number, since it uses less digits than its factorization.

398958433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278686.

The product of its digits is 2799360, while the sum is 52.

The square root of 398958433 is about 19973.9438519287. The cubic root of 398958433 is about 736.1662162253.

The spelling of 398958433 in words is "three hundred ninety-eight million, nine hundred fifty-eight thousand, four hundred thirty-three".