1090240 has 28 divisors (see below), whose sum is σ = 2596896. Its totient is φ = 435968.

The previous prime is 1090217. The next prime is 1090241. The reversal of 1090240 is 420901.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (1090241) 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, 1384 + ... + 2023.

2^1090240 is an apocalyptic number.

1090240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1090240 is an abundant number, since it is smaller than the sum of its proper divisors (1506656).

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

1090240 is an equidigital number, since it uses as much as digits as its factorization.

1090240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3424 (or 3414 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1090240 is about 1044.1455837191. The cubic root of 1090240 is about 102.9217994420.

The spelling of 1090240 in words is "one million, ninety thousand, two hundred forty".