198780825 has 24 divisors (see below), whose sum is σ = 333162208. Its totient is φ = 104561280.

The previous prime is 198780821. The next prime is 198780851. The reversal of 198780825 is 528087891.

It is not a de Polignac number, because 198780825 - 2² = 198780821 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198780821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12679 + ... + 23628.

Almost surely, 2^198780825 is an apocalyptic number.

198780825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

198780825 is a deficient number, since it is larger than the sum of its proper divisors (134381383).

198780825 is a wasteful number, since it uses less digits than its factorization.

198780825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36393 (or 36388 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 48.

The square root of 198780825 is about 14098.9653875737. The cubic root of 198780825 is about 583.6128284212.

The spelling of 198780825 in words is "one hundred ninety-eight million, seven hundred eighty thousand, eight hundred twenty-five".