198774684 has 72 divisors (see below), whose sum is σ = 512143632. Its totient is φ = 64995840.

The previous prime is 198774679. The next prime is 198774733. The reversal of 198774684 is 486477891.

It is a happy number.

It is a super-2 number, since 2×198774684² = 79022749998599712, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 198774684.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 532722 + ... + 533094.

It is an arithmetic number, because the mean of its divisors is an integer number (7113106).

Almost surely, 2^198774684 is an apocalyptic number.

It is an amenable number.

198774684 is an abundant number, since it is smaller than the sum of its proper divisors (313368948).

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

198774684 is a wasteful number, since it uses less digits than its factorization.

198774684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627 (or 622 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The square root of 198774684 is about 14098.7476039540. The cubic root of 198774684 is about 583.6068184463.

The spelling of 198774684 in words is "one hundred ninety-eight million, seven hundred seventy-four thousand, six hundred eighty-four".