22828281 has 8 divisors (see below), whose sum is σ = 34785984. Its totient is φ = 13044720.

The previous prime is 22828277. The next prime is 22828303. The reversal of 22828281 is 18282822.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22828281 - 2² = 22828277 is a prime.

It is a super-2 number, since 2×22828281² = 1042260826829922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (22828231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 543510 + ... + 543551.

It is an arithmetic number, because the mean of its divisors is an integer number (4348248).

Almost surely, 2^22828281 is an apocalyptic number.

22828281 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22828281 is a deficient number, since it is larger than the sum of its proper divisors (11957703).

22828281 is a wasteful number, since it uses less digits than its factorization.

22828281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087071.

The product of its digits is 8192, while the sum is 33.

The square root of 22828281 is about 4777.8950386127. The cubic root of 22828281 is about 283.6771814669.

The spelling of 22828281 in words is "twenty-two million, eight hundred twenty-eight thousand, two hundred eighty-one".