398548198 has 4 divisors (see below), whose sum is σ = 597822300. Its totient is φ = 199274098.

The previous prime is 398548177. The next prime is 398548211. The reversal of 398548198 is 891845893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 891845893 = 53 ⋅16827281.

It is a super-2 number, since 2×398548198² = 317681332258094408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99637048 + ... + 99637051.

It is an arithmetic number, because the mean of its divisors is an integer number (149455575).

Almost surely, 2^398548198 is an apocalyptic number.

398548198 is a deficient number, since it is larger than the sum of its proper divisors (199274102).

398548198 is a wasteful number, since it uses less digits than its factorization.

398548198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199274101.

The product of its digits is 2488320, while the sum is 55.

The square root of 398548198 is about 19963.6719568320. The cubic root of 398548198 is about 735.9138050346.

The spelling of 398548198 in words is "three hundred ninety-eight million, five hundred forty-eight thousand, one hundred ninety-eight".