2249778 has 16 divisors (see below), whose sum is σ = 4520160. Its totient is φ = 746496.

The previous prime is 2249773. The next prime is 2249783. The reversal of 2249778 is 8779422.

It is an interprime number because it is at equal distance from previous prime (2249773) and next prime (2249783).

It is not an unprimeable number, because it can be changed into a prime (2249773) 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, 813 + ... + 2271.

It is an arithmetic number, because the mean of its divisors is an integer number (282510).

2^2249778 is an apocalyptic number.

2249778 is an abundant number, since it is smaller than the sum of its proper divisors (2270382).

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

2249778 is a wasteful number, since it uses less digits than its factorization.

2249778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1721.

The product of its digits is 56448, while the sum is 39.

The square root of 2249778 is about 1499.9259981746. The cubic root of 2249778 is about 131.0327599051.

The spelling of 2249778 in words is "two million, two hundred forty-nine thousand, seven hundred seventy-eight".