1090660 has 24 divisors (see below), whose sum is σ = 2390976. Its totient is φ = 417120.

The previous prime is 1090627. The next prime is 1090681. The reversal of 1090660 is 660901.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 726 + ... + 1645.

It is an arithmetic number, because the mean of its divisors is an integer number (99624).

2^1090660 is an apocalyptic number.

1090660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1090660 is an abundant number, since it is smaller than the sum of its proper divisors (1300316).

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

1090660 is a wasteful number, since it uses less digits than its factorization.

1090660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2403 (or 2401 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 1090660 is about 1044.3466857323. The cubic root of 1090660 is about 102.9350141489.

It can be divided in two parts, 1090 and 660, that multiplied together give a triangular number (719400 = T₁₁₉₉).

The spelling of 1090660 in words is "one million, ninety thousand, six hundred sixty".