2289623778 has 24 divisors (see below), whose sum is σ = 5342456028. Its totient is φ = 704499552.

The previous prime is 2289623773. The next prime is 2289623789. The reversal of 2289623778 is 8773269822.

2289623778 is a `hidden beast` number, since 2 + 2 + 8 + 9 + 623 + 7 + 7 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2289335409 + 288369 = 47847^2 + 537^2 .

It is not an unprimeable number, because it can be changed into a prime (2289623773) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4892125 + ... + 4892592.

Almost surely, 2^2289623778 is an apocalyptic number.

2289623778 is an abundant number, since it is smaller than the sum of its proper divisors (3052832250).

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

2289623778 is a wasteful number, since it uses less digits than its factorization.

2289623778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9784738 (or 9784735 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 54.

The square root of 2289623778 is about 47850.0133542301. The cubic root of 2289623778 is about 1318.0181036211.

The spelling of 2289623778 in words is "two billion, two hundred eighty-nine million, six hundred twenty-three thousand, seven hundred seventy-eight".