22280730 has 32 divisors (see below), whose sum is σ = 56289600. Its totient is φ = 5628672.

The previous prime is 22280719. The next prime is 22280743. The reversal of 22280730 is 3708222.

It is a self number, because there is not a number n which added to its sum of digits gives 22280730.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18975 + ... + 20114.

It is an arithmetic number, because the mean of its divisors is an integer number (1759050).

Almost surely, 2^22280730 is an apocalyptic number.

22280730 is an abundant number, since it is smaller than the sum of its proper divisors (34008870).

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

22280730 is a wasteful number, since it uses less digits than its factorization.

22280730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39118.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 22280730 is about 4720.2468155807. The cubic root of 22280730 is about 281.3907423978.

Adding to 22280730 its reverse (3708222), we get a palindrome (25988952).

The spelling of 22280730 in words is "twenty-two million, two hundred eighty thousand, seven hundred thirty".