2245780 has 12 divisors (see below), whose sum is σ = 4716180. Its totient is φ = 898304.

The previous prime is 2245759. The next prime is 2245783. The reversal of 2245780 is 875422.

It can be written as a sum of positive squares in 2 ways, for example, as 1752976 + 492804 = 1324^2 + 702^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2245783) 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 3 ways as a sum of consecutive naturals, for example, 56125 + ... + 56164.

It is an arithmetic number, because the mean of its divisors is an integer number (393015).

2^2245780 is an apocalyptic number.

2245780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2245780 is an abundant number, since it is smaller than the sum of its proper divisors (2470400).

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

2245780 is a wasteful number, since it uses less digits than its factorization.

2245780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112298 (or 112296 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 2245780 is about 1498.5926731437. The cubic root of 2245780 is about 130.9550960056.

It can be divided in two parts, 2245 and 780, that added together give a square (3025 = 55²).

The spelling of 2245780 in words is "two million, two hundred forty-five thousand, seven hundred eighty".