1089540 has 36 divisors (see below), whose sum is σ = 3305484. Its totient is φ = 290496.

The previous prime is 1089523. The next prime is 1089551. The reversal of 1089540 is 459801.

It can be written as a sum of positive squares in 2 ways, for example, as 213444 + 876096 = 462^2 + 936^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2847 + ... + 3206.

It is an arithmetic number, because the mean of its divisors is an integer number (91819).

2^1089540 is an apocalyptic number.

1089540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1089540 is an abundant number, since it is smaller than the sum of its proper divisors (2215944).

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

1089540 is a wasteful number, since it uses less digits than its factorization.

1089540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6068 (or 6063 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1089540 is about 1043.8103275979. The cubic root of 1089540 is about 102.8997673866.

The spelling of 1089540 in words is "one million, eighty-nine thousand, five hundred forty".