1964440 has 32 divisors (see below), whose sum is σ = 4492080. Its totient is φ = 772992.

The previous prime is 1964437. The next prime is 1964447. The reversal of 1964440 is 444691.

It is a junction number, because it is equal to n+sod(n) for n = 1964399 and 1964408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1964447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2314 + ... + 3046.

2^1964440 is an apocalyptic number.

1964440 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 1964440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2246040).

1964440 is an abundant number, since it is smaller than the sum of its proper divisors (2527640).

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

1964440 is a wasteful number, since it uses less digits than its factorization.

1964440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811 (or 807 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 1964440 is about 1401.5848172694. The cubic root of 1964440 is about 125.2409220210.

The spelling of 1964440 in words is "one million, nine hundred sixty-four thousand, four hundred forty".