1964720 has 40 divisors (see below), whose sum is σ = 4687200. Its totient is φ = 765440.

The previous prime is 1964719. The next prime is 1964723. The reversal of 1964720 is 274691.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (1964723) 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, 2981 + ... + 3579.

It is an arithmetic number, because the mean of its divisors is an integer number (117180).

2^1964720 is an apocalyptic number.

1964720 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 1964720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2343600).

1964720 is an abundant number, since it is smaller than the sum of its proper divisors (2722480).

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

1964720 is a wasteful number, since it uses less digits than its factorization.

1964720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653 (or 647 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 1964720 is about 1401.6847006371. The cubic root of 1964720 is about 125.2468721123.

Subtracting from 1964720 its sum of digits (29), we obtain a palindrome (1964691).

The spelling of 1964720 in words is "one million, nine hundred sixty-four thousand, seven hundred twenty".