198531772 has 12 divisors (see below), whose sum is σ = 349763400. Its totient is φ = 98599376.

The previous prime is 198531733. The next prime is 198531793. The reversal of 198531772 is 277135891.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 165958 + ... + 167149.

It is an arithmetic number, because the mean of its divisors is an integer number (29146950).

Almost surely, 2^198531772 is an apocalyptic number.

It is an amenable number.

198531772 is a deficient number, since it is larger than the sum of its proper divisors (151231628).

198531772 is a wasteful number, since it uses less digits than its factorization.

198531772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333260 (or 333258 counting only the distinct ones).

The product of its digits is 105840, while the sum is 43.

The square root of 198531772 is about 14090.1303045784. The cubic root of 198531772 is about 583.3689898930.

The spelling of 198531772 in words is "one hundred ninety-eight million, five hundred thirty-one thousand, seven hundred seventy-two".