28222580 has 24 divisors (see below), whose sum is σ = 59377920. Its totient is φ = 11268000.

The previous prime is 28222561. The next prime is 28222609. The reversal of 28222580 is 8522282.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 14081 + ... + 15959.

It is an arithmetic number, because the mean of its divisors is an integer number (2474080).

Almost surely, 2^28222580 is an apocalyptic number.

28222580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28222580 is an abundant number, since it is smaller than the sum of its proper divisors (31155340).

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

28222580 is a wasteful number, since it uses less digits than its factorization.

28222580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2639 (or 2637 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 29.

The square root of 28222580 is about 5312.4928235246. The cubic root of 28222580 is about 304.4613982701.

The spelling of 28222580 in words is "twenty-eight million, two hundred twenty-two thousand, five hundred eighty".