1180440 has 64 divisors (see below), whose sum is σ = 3938400. Its totient is φ = 314496.

The previous prime is 1180427. The next prime is 1180447. The reversal of 1180440 is 440811.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1180447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 534 + ... + 1626.

2^1180440 is an apocalyptic number.

1180440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1180440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1969200).

1180440 is an abundant number, since it is smaller than the sum of its proper divisors (2757960).

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

1180440 is a wasteful number, since it uses less digits than its factorization.

1180440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113 (or 1103 counting only the distinct ones).

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

The square root of 1180440 is about 1086.4805566599. The cubic root of 1180440 is about 105.6853132890.

The spelling of 1180440 in words is "one million, one hundred eighty thousand, four hundred forty".