28223630 has 16 divisors (see below), whose sum is σ = 50954400. Its totient is φ = 11255712.

The previous prime is 28223627. The next prime is 28223633. The reversal of 28223630 is 3632282.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28223627) and next prime (28223633).

It is a self number, because there is not a number n which added to its sum of digits gives 28223630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28223633) by changing a digit.

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, 554 + ... + 7533.

It is an arithmetic number, because the mean of its divisors is an integer number (3184650).

Almost surely, 2^28223630 is an apocalyptic number.

28223630 is a deficient number, since it is larger than the sum of its proper divisors (22730770).

28223630 is a wasteful number, since it uses less digits than its factorization.

28223630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8443.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 28223630 is about 5312.5916462683. The cubic root of 28223630 is about 304.4651739762.

The spelling of 28223630 in words is "twenty-eight million, two hundred twenty-three thousand, six hundred thirty".