28222612 has 24 divisors (see below), whose sum is σ = 54492480. Its totient is φ = 12682560.

The previous prime is 28222609. The next prime is 28222613. The reversal of 28222612 is 21622282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28222613) 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, 313 + ... + 7519.

It is an arithmetic number, because the mean of its divisors is an integer number (2270520).

Almost surely, 2^28222612 is an apocalyptic number.

28222612 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28222612 is a deficient number, since it is larger than the sum of its proper divisors (26269868).

28222612 is a wasteful number, since it uses less digits than its factorization.

28222612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7311 (or 7309 counting only the distinct ones).

The product of its digits is 1536, while the sum is 25.

The square root of 28222612 is about 5312.4958352925. The cubic root of 28222612 is about 304.4615133406.

Adding to 28222612 its reverse (21622282), we get a palindrome (49844894).

The spelling of 28222612 in words is "twenty-eight million, two hundred twenty-two thousand, six hundred twelve".