198409974 has 16 divisors (see below), whose sum is σ = 453508608. Its totient is φ = 56688552.

The previous prime is 198409969. The next prime is 198409999. The reversal of 198409974 is 479904891.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2361982 + ... + 2362065.

It is an arithmetic number, because the mean of its divisors is an integer number (28344288).

Almost surely, 2^198409974 is an apocalyptic number.

198409974 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

198409974 is an abundant number, since it is smaller than the sum of its proper divisors (255098634).

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

198409974 is a wasteful number, since it uses less digits than its factorization.

198409974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4724059.

The product of its (nonzero) digits is 653184, while the sum is 51.

The square root of 198409974 is about 14085.8075380860. The cubic root of 198409974 is about 583.2496677467.

The spelling of 198409974 in words is "one hundred ninety-eight million, four hundred nine thousand, nine hundred seventy-four".