1089860 has 12 divisors (see below), whose sum is σ = 2288748. Its totient is φ = 435936.

The previous prime is 1089841. The next prime is 1089863. The reversal of 1089860 is 689801.

It can be written as a sum of positive squares in 2 ways, for example, as 329476 + 760384 = 574^2 + 872^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27227 + ... + 27266.

It is an arithmetic number, because the mean of its divisors is an integer number (190729).

2^1089860 is an apocalyptic number.

1089860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1089860 is an abundant number, since it is smaller than the sum of its proper divisors (1198888).

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

1089860 is a wasteful number, since it uses less digits than its factorization.

1089860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54502 (or 54500 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 1089860 is about 1043.9636008980. The cubic root of 1089860 is about 102.9098403540.

The spelling of 1089860 in words is "one million, eighty-nine thousand, eight hundred sixty".