1198840 has 64 divisors (see below), whose sum is σ = 2993760. Its totient is φ = 430080.

The previous prime is 1198819. The next prime is 1198849. The reversal of 1198840 is 488911.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1198849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27859 + ... + 27901.

2^1198840 is an apocalyptic number.

1198840 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 1198840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1496880).

1198840 is an abundant number, since it is smaller than the sum of its proper divisors (1794920).

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

1198840 is a wasteful number, since it uses less digits than its factorization.

1198840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 1198840 is about 1094.9155218555. The cubic root of 1198840 is about 106.2316046585.

The spelling of 1198840 in words is "one million, one hundred ninety-eight thousand, eight hundred forty".