198887972 has 12 divisors (see below), whose sum is σ = 366372720. Its totient is φ = 94210056.

The previous prime is 198887957. The next prime is 198887977. The reversal of 198887972 is 279788891.

198887972 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (198887977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1308398 + ... + 1308549.

It is an arithmetic number, because the mean of its divisors is an integer number (30531060).

Almost surely, 2^198887972 is an apocalyptic number.

It is an amenable number.

198887972 is a deficient number, since it is larger than the sum of its proper divisors (167484748).

198887972 is a wasteful number, since it uses less digits than its factorization.

198887972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2616970 (or 2616968 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 59.

The square root of 198887972 is about 14102.7646934918. The cubic root of 198887972 is about 583.7176694048.

The spelling of 198887972 in words is "one hundred ninety-eight million, eight hundred eighty-seven thousand, nine hundred seventy-two".