916440 has 64 divisors (see below), whose sum is σ = 3144960. Its totient is φ = 209280.

The previous prime is 916417. The next prime is 916441. The reversal of 916440 is 44619.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 916440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (916441) by changing a digit.

916440 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 295 + ... + 1385.

It is an arithmetic number, because the mean of its divisors is an integer number (49140).

2⁹¹⁶⁴⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 916440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1572480).

916440 is an abundant number, since it is smaller than the sum of its proper divisors (2228520).

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

916440 is a wasteful number, since it uses less digits than its factorization.

916440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112 (or 1108 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 916440 is about 957.3087276318. The cubic root of 916440 is about 97.1332705979.

The spelling of 916440 in words is "nine hundred sixteen thousand, four hundred forty".