1164440 has 32 divisors (see below), whose sum is σ = 2684880. Its totient is φ = 454272.

The previous prime is 1164439. The next prime is 1164461. The reversal of 1164440 is 444611.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1382 + ... + 2058.

2^1164440 is an apocalyptic number.

1164440 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 1164440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1342440).

1164440 is an abundant number, since it is smaller than the sum of its proper divisors (1520440).

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

1164440 is a wasteful number, since it uses less digits than its factorization.

1164440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731 (or 727 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1164440 is about 1079.0922110737. The cubic root of 1164440 is about 105.2056438442.

The spelling of 1164440 in words is "one million, one hundred sixty-four thousand, four hundred forty".