1198890 has 96 divisors (see below), whose sum is σ = 3908736. Its totient is φ = 247680.

The previous prime is 1198877. The next prime is 1198903. The reversal of 1198890 is 988911.

It is an interprime number because it is at equal distance from previous prime (1198877) and next prime (1198903).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6844 + ... + 7016.

It is an arithmetic number, because the mean of its divisors is an integer number (40716).

2^1198890 is an apocalyptic number.

1198890 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 1198890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1954368).

1198890 is an abundant number, since it is smaller than the sum of its proper divisors (2709846).

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

1198890 is a wasteful number, since it uses less digits than its factorization.

1198890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 1198890 is about 1094.9383544291. The cubic root of 1198890 is about 106.2330815045.

Adding to 1198890 its sum of digits (36), we get a triangular number (1198926 = T₁₅₄₈).

It can be divided in two parts, 119 and 8890, that added together give a palindrome (9009).

The spelling of 1198890 in words is "one million, one hundred ninety-eight thousand, eight hundred ninety".