1198900 has 36 divisors (see below), whose sum is σ = 2742880. Its totient is φ = 453600.

The previous prime is 1198877. The next prime is 1198903. The reversal of 1198900 is 98911.

It is a super-2 number, since 2×1198900² = 2874722420000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1198903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1585 + ... + 2215.

2^1198900 is an apocalyptic number.

1198900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1198900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1371440).

1198900 is an abundant number, since it is smaller than the sum of its proper divisors (1543980).

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

1198900 is a wasteful number, since it uses less digits than its factorization.

1198900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664 (or 657 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 1198900 is about 1094.9429208867. The cubic root of 1198900 is about 106.2333768688.

The spelling of 1198900 in words is "one million, one hundred ninety-eight thousand, nine hundred".