198981450 has 36 divisors (see below), whose sum is σ = 534598038. Its totient is φ = 53061600.

The previous prime is 198981437. The next prime is 198981457. The reversal of 198981450 is 54189891.

198981450 is a `hidden beast` number, since 198 + 9 + 8 + 1 + 450 = 666.

198981450 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 122611329 + 76370121 = 11073^2 + 8739^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 198981396 and 198981405.

It is not an unprimeable number, because it can be changed into a prime (198981457) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 220641 + ... + 221540.

Almost surely, 2^198981450 is an apocalyptic number.

198981450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198981450 is an abundant number, since it is smaller than the sum of its proper divisors (335616588).

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

198981450 is a wasteful number, since it uses less digits than its factorization.

198981450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442199 (or 442191 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The square root of 198981450 is about 14106.0784770254. The cubic root of 198981450 is about 583.8091048219.

The spelling of 198981450 in words is "one hundred ninety-eight million, nine hundred eighty-one thousand, four hundred fifty".