28888223 has 8 divisors (see below), whose sum is σ = 35554848. Its totient is φ = 22856544.

The previous prime is 28888201. The next prime is 28888259. The reversal of 28888223 is 32288882.

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

It is a cyclic number.

It is not a de Polignac number, because 28888223 - 2⁶ = 28888159 is a prime.

It is a super-4 number, since 4×28888223⁴ (a number of 31 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28888283) 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, 158636 + ... + 158817.

It is an arithmetic number, because the mean of its divisors is an integer number (4444356).

Almost surely, 2^28888223 is an apocalyptic number.

28888223 is a deficient number, since it is larger than the sum of its proper divisors (6666625).

28888223 is a wasteful number, since it uses less digits than its factorization.

28888223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317473.

The product of its digits is 98304, while the sum is 41.

The square root of 28888223 is about 5374.7765534950. The cubic root of 28888223 is about 306.8364451876.

It can be divided in two parts, 2888 and 8223, that added together give a palindrome (11111).

The spelling of 28888223 in words is "twenty-eight million, eight hundred eighty-eight thousand, two hundred twenty-three".