1989190 has 32 divisors (see below), whose sum is σ = 4140864. Its totient is φ = 673920.

The previous prime is 1989161. The next prime is 1989193. The reversal of 1989190 is 919891.

It is a super-2 number, since 2×1989190² = 7913753712200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10900 + ... + 11080.

It is an arithmetic number, because the mean of its divisors is an integer number (129402).

2^1989190 is an apocalyptic number.

1989190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1989190 is an abundant number, since it is smaller than the sum of its proper divisors (2151674).

1989190 is a wasteful number, since it uses less digits than its factorization.

1989190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352.

The product of its (nonzero) digits is 5832, while the sum is 37.

The square root of 1989190 is about 1410.3864718580. The cubic root of 1989190 is about 125.7646990105.

The spelling of 1989190 in words is "one million, nine hundred eighty-nine thousand, one hundred ninety".