28288922 has 8 divisors (see below), whose sum is σ = 42470400. Its totient is φ = 14132124.

The previous prime is 28288921. The next prime is 28288927. The reversal of 28288922 is 22988282.

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

It is a self number, because there is not a number n which added to its sum of digits gives 28288922.

It is not an unprimeable number, because it can be changed into a prime (28288921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2972 + ... + 8087.

It is an arithmetic number, because the mean of its divisors is an integer number (5308800).

Almost surely, 2^28288922 is an apocalyptic number.

28288922 is a deficient number, since it is larger than the sum of its proper divisors (14181478).

28288922 is a wasteful number, since it uses less digits than its factorization.

28288922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12340.

The product of its digits is 73728, while the sum is 41.

The square root of 28288922 is about 5318.7331198322. The cubic root of 28288922 is about 304.6997744448.

The spelling of 28288922 in words is "twenty-eight million, two hundred eighty-eight thousand, nine hundred twenty-two".