22278547600 has 135 divisors (see below), whose sum is σ = 56987710347. Its totient is φ = 8368112640.

The previous prime is 22278547567. The next prime is 22278547601. The reversal of 22278547600 is 674587222.

The square root of 22278547600 is 149260.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 521117584 + 21757430016 = 22828^2 + 147504^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22278547601) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 50748181 + ... + 50748619.

Almost surely, 2^22278547600 is an apocalyptic number.

22278547600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

22278547600 is the 149260-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22278547600

22278547600 is an abundant number, since it is smaller than the sum of its proper divisors (34709162747).

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

22278547600 is an equidigital number, since it uses as much as digits as its factorization.

22278547600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 930 (or 463 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 43.

The spelling of 22278547600 in words is "twenty-two billion, two hundred seventy-eight million, five hundred forty-seven thousand, six hundred".