28223253 has 12 divisors (see below), whose sum is σ = 40917708. Its totient is φ = 18745920.

The previous prime is 28223249. The next prime is 28223257. The reversal of 28223253 is 35232282.

It is an interprime number because it is at equal distance from previous prime (28223249) and next prime (28223257).

It can be written as a sum of positive squares in 2 ways, for example, as 3392964 + 24830289 = 1842^2 + 4983^2 .

It is not a de Polignac number, because 28223253 - 2² = 28223249 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28223257) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3168 + ... + 8153.

It is an arithmetic number, because the mean of its divisors is an integer number (3409809).

Almost surely, 2^28223253 is an apocalyptic number.

It is an amenable number.

28223253 is a deficient number, since it is larger than the sum of its proper divisors (12694455).

28223253 is a wasteful number, since it uses less digits than its factorization.

28223253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11604 (or 11601 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 28223253 is about 5312.5561644090. The cubic root of 28223253 is about 304.4638183287.

The spelling of 28223253 in words is "twenty-eight million, two hundred twenty-three thousand, two hundred fifty-three".