2228778 has 12 divisors (see below), whose sum is σ = 4829058. Its totient is φ = 742920.

The previous prime is 2228777. The next prime is 2228783. The reversal of 2228778 is 8778222.

It can be written as a sum of positive squares in only one way, i.e., 2169729 + 59049 = 1473^2 + 243^2 .

It is not an unprimeable number, because it can be changed into a prime (2228771) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 61893 + ... + 61928.

2^2228778 is an apocalyptic number.

2228778 is an abundant number, since it is smaller than the sum of its proper divisors (2600280).

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

2228778 is a wasteful number, since it uses less digits than its factorization.

2228778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123829 (or 123826 counting only the distinct ones).

The product of its digits is 25088, while the sum is 36.

The square root of 2228778 is about 1492.9092403760. The cubic root of 2228778 is about 130.6237870663.

The spelling of 2228778 in words is "two million, two hundred twenty-eight thousand, seven hundred seventy-eight".