2264640 has 112 divisors (see below), whose sum is σ = 8241792. Its totient is φ = 516096.

The previous prime is 2264627. The next prime is 2264641. The reversal of 2264640 is 464622.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 2264640.

It is not an unprimeable number, because it can be changed into a prime (2264641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6552 + ... + 6888.

2^2264640 is an apocalyptic number.

2264640 is a gapful number since it is divisible by the number (20) 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 2264640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4120896).

2264640 is an abundant number, since it is smaller than the sum of its proper divisors (5977152).

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

2264640 is a wasteful number, since it uses less digits than its factorization.

2264640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364 (or 354 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 2264640 is about 1504.8720875875. The cubic root of 2264640 is about 131.3206603648.

The spelling of 2264640 in words is "two million, two hundred sixty-four thousand, six hundred forty".