28315223 has 8 divisors (see below), whose sum is σ = 29449200. Its totient is φ = 27191808.

The previous prime is 28315213. The next prime is 28315229. The reversal of 28315223 is 32251382.

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 28315223 - 2⁴ = 28315207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28315192 and 28315201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28315229) 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, 3068 + ... + 8126.

It is an arithmetic number, because the mean of its divisors is an integer number (3681150).

Almost surely, 2^28315223 is an apocalyptic number.

28315223 is a deficient number, since it is larger than the sum of its proper divisors (1133977).

28315223 is a wasteful number, since it uses less digits than its factorization.

28315223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5281.

The product of its digits is 2880, while the sum is 26.

The square root of 28315223 is about 5321.2050326970. The cubic root of 28315223 is about 304.7941744890.

The spelling of 28315223 in words is "twenty-eight million, three hundred fifteen thousand, two hundred twenty-three".