1140840 has 48 divisors (see below), whose sum is σ = 3708900. Its totient is φ = 304128.

The previous prime is 1140803. The next prime is 1140847. The reversal of 1140840 is 480411.

It can be written as a sum of positive squares in 2 ways, for example, as 1127844 + 12996 = 1062^2 + 114^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1140847) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1225 + ... + 1944.

2^1140840 is an apocalyptic number.

1140840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1140840 is an abundant number, since it is smaller than the sum of its proper divisors (2568060).

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

1140840 is a wasteful number, since it uses less digits than its factorization.

1140840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3186 (or 3179 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1140840 is about 1068.1011188085. The cubic root of 1140840 is about 104.4900443039.

The spelling of 1140840 in words is "one million, one hundred forty thousand, eight hundred forty".