2780244 has 30 divisors (see below), whose sum is σ = 7268954. Its totient is φ = 926640.

The previous prime is 2780243. The next prime is 2780273. The reversal of 2780244 is 4420872.

It can be written as a sum of positive squares in only one way, i.e., 1411344 + 1368900 = 1188^2 + 1170^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2780243) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3967 + ... + 4614.

2^2780244 is an apocalyptic number.

It is an amenable number.

2780244 is an abundant number, since it is smaller than the sum of its proper divisors (4488710).

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

2780244 is a wasteful number, since it uses less digits than its factorization.

2780244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8597 (or 8586 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 2780244 is about 1667.4063691854. The cubic root of 2780244 is about 140.6137004254.

The spelling of 2780244 in words is "two million, seven hundred eighty thousand, two hundred forty-four".