1989894 has 16 divisors (see below), whose sum is σ = 4077360. Its totient is φ = 647040.

The previous prime is 1989877. The next prime is 1989899. The reversal of 1989894 is 4989891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989899) 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 7 ways as a sum of consecutive naturals, for example, 3799 + ... + 4290.

It is an arithmetic number, because the mean of its divisors is an integer number (254835).

2^1989894 is an apocalyptic number.

1989894 is an abundant number, since it is smaller than the sum of its proper divisors (2087466).

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

1989894 is a wasteful number, since it uses less digits than its factorization.

1989894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8135.

The product of its digits is 186624, while the sum is 48.

The square root of 1989894 is about 1410.6360267624. The cubic root of 1989894 is about 125.7795338436.

The spelling of 1989894 in words is "one million, nine hundred eighty-nine thousand, eight hundred ninety-four".