964440 has 128 divisors (see below), whose sum is σ = 3456000. Its totient is φ = 238464.

The previous prime is 964433. The next prime is 964463. The reversal of 964440 is 44469.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

964440 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 31 ways as a sum of consecutive naturals, for example, 20497 + ... + 20543.

It is an arithmetic number, because the mean of its divisors is an integer number (27000).

2⁹⁶⁴⁴⁴⁰ is an apocalyptic number.

964440 is a gapful number since it is divisible by the number (90) 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 964440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1728000).

964440 is an abundant number, since it is smaller than the sum of its proper divisors (2491560).

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

964440 is a wasteful number, since it uses less digits than its factorization.

964440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86 (or 76 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 964440 is about 982.0590613604. The cubic root of 964440 is about 98.8003321903.

The spelling of 964440 in words is "nine hundred sixty-four thousand, four hundred forty".