198525810 has 64 divisors (see below), whose sum is σ = 554833152. Its totient is φ = 44518656.

The previous prime is 198525739. The next prime is 198525823. The reversal of 198525810 is 18525891.

It is a super-2 number, since 2×198525810² = 78824994472312200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2212 + ... + 20048.

It is an arithmetic number, because the mean of its divisors is an integer number (8669268).

Almost surely, 2^198525810 is an apocalyptic number.

198525810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 198525810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277416576).

198525810 is an abundant number, since it is smaller than the sum of its proper divisors (356307342).

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

198525810 is a wasteful number, since it uses less digits than its factorization.

198525810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17907.

The product of its (nonzero) digits is 28800, while the sum is 39.

The square root of 198525810 is about 14089.9187364583. The cubic root of 198525810 is about 583.3631502219.

The spelling of 198525810 in words is "one hundred ninety-eight million, five hundred twenty-five thousand, eight hundred ten".