2272298778 has 64 divisors (see below), whose sum is σ = 5357975040. Its totient is φ = 711360000.

The previous prime is 2272298773. The next prime is 2272298779. The reversal of 2272298778 is 8778922722.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (2272298773) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 475903 + ... + 480653.

It is an arithmetic number, because the mean of its divisors is an integer number (83718360).

Almost surely, 2^2272298778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2272298778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2678987520).

2272298778 is an abundant number, since it is smaller than the sum of its proper divisors (3085676262).

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

2272298778 is a wasteful number, since it uses less digits than its factorization.

2272298778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5300 (or 5294 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 54.

The square root of 2272298778 is about 47668.6351598197. The cubic root of 2272298778 is about 1314.6853142051.

The spelling of 2272298778 in words is "two billion, two hundred seventy-two million, two hundred ninety-eight thousand, seven hundred seventy-eight".