398366874 has 12 divisors (see below), whose sum is σ = 863128266. Its totient is φ = 132788952.

The previous prime is 398366867. The next prime is 398366887. The reversal of 398366874 is 478663893.

It can be written as a sum of positive squares in only one way, i.e., 363474225 + 34892649 = 19065^2 + 5907^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 398366874.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 11065729 + ... + 11065764.

Almost surely, 2^398366874 is an apocalyptic number.

398366874 is an abundant number, since it is smaller than the sum of its proper divisors (464761392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

398366874 is a wasteful number, since it uses less digits than its factorization.

398366874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22131501 (or 22131498 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 54.

The square root of 398366874 is about 19959.1300912640. The cubic root of 398366874 is about 735.8021840086.

The spelling of 398366874 in words is "three hundred ninety-eight million, three hundred sixty-six thousand, eight hundred seventy-four".