28072223 has 8 divisors (see below), whose sum is σ = 28593600. Its totient is φ = 27554688.

The previous prime is 28072211. The next prime is 28072241. The reversal of 28072223 is 32227082.

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 28072223 - 2¹² = 28068127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28072192 and 28072201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28072273) 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, 16643 + ... + 18251.

It is an arithmetic number, because the mean of its divisors is an integer number (3574200).

Almost surely, 2^28072223 is an apocalyptic number.

28072223 is a deficient number, since it is larger than the sum of its proper divisors (521377).

28072223 is a wasteful number, since it uses less digits than its factorization.

28072223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1921.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 28072223 is about 5298.3226591064. The cubic root of 28072223 is about 303.9197582251.

The spelling of 28072223 in words is "twenty-eight million, seventy-two thousand, two hundred twenty-three".