1989198 has 24 divisors (see below), whose sum is σ = 4470648. Its totient is φ = 662904.

The previous prime is 1989193. The next prime is 1989203. The reversal of 1989198 is 8919891.

It is an interprime number because it is at equal distance from previous prime (1989193) and next prime (1989203).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989193) 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, 1561 + ... + 2532.

It is an arithmetic number, because the mean of its divisors is an integer number (186277).

2^1989198 is an apocalyptic number.

1989198 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1989198 is an abundant number, since it is smaller than the sum of its proper divisors (2481450).

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

1989198 is an equidigital number, since it uses as much as digits as its factorization.

1989198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4110 (or 4098 counting only the distinct ones).

The product of its digits is 46656, while the sum is 45.

The square root of 1989198 is about 1410.3893079572. The cubic root of 1989198 is about 125.7648676078.

It can be divided in two parts, 1989 and 198, that added together give a 7-th power (2187 = 3⁷).

The spelling of 1989198 in words is "one million, nine hundred eighty-nine thousand, one hundred ninety-eight".