2228521986 has 48 divisors (see below), whose sum is σ = 4991470848. Its totient is φ = 717832800.

The previous prime is 2228521979. The next prime is 2228521987. The reversal of 2228521986 is 6891258222.

2228521986 is a `hidden beast` number, since 22 + 28 + 521 + 9 + 86 = 666.

It is not an unprimeable number, because it can be changed into a prime (2228521987) 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, 442221 + ... + 447231.

It is an arithmetic number, because the mean of its divisors is an integer number (103988976).

Almost surely, 2^2228521986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2228521986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2495735424).

2228521986 is an abundant number, since it is smaller than the sum of its proper divisors (2762948862).

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

2228521986 is a wasteful number, since it uses less digits than its factorization.

2228521986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5847 (or 5844 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 2228521986 is about 47207.2238751655. The cubic root of 2228521986 is about 1306.1878540186.

The spelling of 2228521986 in words is "two billion, two hundred twenty-eight million, five hundred twenty-one thousand, nine hundred eighty-six".