22284778500 has 72 divisors (see below), whose sum is σ = 70301062104. Its totient is φ = 5942606400.

The previous prime is 22284778469. The next prime is 22284778511. The reversal of 22284778500 is 587748222.

It can be written as a sum of positive squares in 4 ways, for example, as 1788274944 + 20496503556 = 42288^2 + 143166^2 .

It is a super-2 number, since 2×22284778500² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2471587 + ... + 2480586.

Almost surely, 2^22284778500 is an apocalyptic number.

22284778500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22284778500 is an abundant number, since it is smaller than the sum of its proper divisors (48016283604).

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

22284778500 is a wasteful number, since it uses less digits than its factorization.

22284778500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4952198 (or 4952183 counting only the distinct ones).

The product of its (nonzero) digits is 501760, while the sum is 45.

The spelling of 22284778500 in words is "twenty-two billion, two hundred eighty-four million, seven hundred seventy-eight thousand, five hundred".