2245040644 has 120 divisors (see below), whose sum is σ = 5082134400. Its totient is φ = 860408640.

The previous prime is 2245040639. The next prime is 2245040711. The reversal of 2245040644 is 4460405422.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8345742 + ... + 8346010.

It is an arithmetic number, because the mean of its divisors is an integer number (42351120).

Almost surely, 2^2245040644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2245040644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2541067200).

2245040644 is an abundant number, since it is smaller than the sum of its proper divisors (2837093756).

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

2245040644 is a wasteful number, since it uses less digits than its factorization.

2245040644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391 (or 368 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 31.

The square root of 2245040644 is about 47381.8598621878. The cubic root of 2245040644 is about 1309.4072341003.

The spelling of 2245040644 in words is "two billion, two hundred forty-five million, forty thousand, six hundred forty-four".