1965440 has 64 divisors (see below), whose sum is σ = 4883760. Its totient is φ = 755712.

The previous prime is 1965437. The next prime is 1965443. The reversal of 1965440 is 445691.

It is an interprime number because it is at equal distance from previous prime (1965437) and next prime (1965443).

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1965443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23639 + ... + 23721.

2^1965440 is an apocalyptic number.

1965440 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 1965440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2441880).

1965440 is an abundant number, since it is smaller than the sum of its proper divisors (2918320).

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

1965440 is an equidigital number, since it uses as much as digits as its factorization.

1965440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1965440 is about 1401.9415109055. The cubic root of 1965440 is about 125.2621697517.

The spelling of 1965440 in words is "one million, nine hundred sixty-five thousand, four hundred forty".