198040988 has 24 divisors (see below), whose sum is σ = 359326800. Its totient is φ = 95434880.

The previous prime is 198040979. The next prime is 198041021. The reversal of 198040988 is 889040891.

It is a super-2 number, since 2×198040988² = 78440465856032288, 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 in 7 ways as a sum of consecutive naturals, for example, 6338 + ... + 20886.

It is an arithmetic number, because the mean of its divisors is an integer number (14971950).

Almost surely, 2^198040988 is an apocalyptic number.

It is an amenable number.

198040988 is a deficient number, since it is larger than the sum of its proper divisors (161285812).

198040988 is a wasteful number, since it uses less digits than its factorization.

198040988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14677 (or 14675 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 47.

The square root of 198040988 is about 14072.7036492637. The cubic root of 198040988 is about 582.8878840018.

The spelling of 198040988 in words is "one hundred ninety-eight million, forty thousand, nine hundred eighty-eight".