2278845 has 24 divisors (see below), whose sum is σ = 4001400. Its totient is φ = 1199616.

The previous prime is 2278831. The next prime is 2278847. The reversal of 2278845 is 5488722.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1764 + 2277081 = 42^2 + 1509^2 .

It is not a de Polignac number, because 2278845 - 2⁵ = 2278813 is a prime.

2278845 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2278847) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3721 + ... + 4289.

It is an arithmetic number, because the mean of its divisors is an integer number (166725).

2^2278845 is an apocalyptic number.

It is an amenable number.

2278845 is a deficient number, since it is larger than the sum of its proper divisors (1722555).

2278845 is a wasteful number, since it uses less digits than its factorization.

2278845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669 (or 666 counting only the distinct ones).

The product of its digits is 35840, while the sum is 36.

The square root of 2278845 is about 1509.5843798874. The cubic root of 2278845 is about 131.5946587695.

The spelling of 2278845 in words is "two million, two hundred seventy-eight thousand, eight hundred forty-five".