1964240 has 40 divisors (see below), whose sum is σ = 4681248. Its totient is φ = 766080.

The previous prime is 1964213. The next prime is 1964243. The reversal of 1964240 is 424691.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1964243) 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, 3155 + ... + 3725.

2^1964240 is an apocalyptic number.

1964240 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 1964240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2340624).

1964240 is an abundant number, since it is smaller than the sum of its proper divisors (2717008).

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

1964240 is a wasteful number, since it uses less digits than its factorization.

1964240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627 (or 621 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1964240 is about 1401.5134676485. The cubic root of 1964240 is about 125.2366716096.

The spelling of 1964240 in words is "one million, nine hundred sixty-four thousand, two hundred forty".