1881198 has 32 divisors (see below), whose sum is σ = 4561920. Its totient is φ = 569880.

The previous prime is 1881197. The next prime is 1881199. The reversal of 1881198 is 8911881.

It is an interprime number because it is at equal distance from previous prime (1881197) and next prime (1881199).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1881197) 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, 990 + ... + 2177.

It is an arithmetic number, because the mean of its divisors is an integer number (142560).

2^1881198 is an apocalyptic number.

1881198 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1881198 is an abundant number, since it is smaller than the sum of its proper divisors (2680722).

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

1881198 is a wasteful number, since it uses less digits than its factorization.

1881198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3189 (or 3183 counting only the distinct ones).

The product of its digits is 4608, while the sum is 36.

The square root of 1881198 is about 1371.5677161555. The cubic root of 1881198 is about 123.4463261221.

The spelling of 1881198 in words is "one million, eight hundred eighty-one thousand, one hundred ninety-eight".