28502223 has 16 divisors (see below), whose sum is σ = 40116480. Its totient is φ = 17950464.

The previous prime is 28502197. The next prime is 28502231. The reversal of 28502223 is 32220582.

It is not a de Polignac number, because 28502223 - 2¹⁶ = 28436687 is a prime.

It is a super-3 number, since 3×28502223³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28502193 and 28502202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28502293) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37990 + ... + 38732.

It is an arithmetic number, because the mean of its divisors is an integer number (2507280).

Almost surely, 2^28502223 is an apocalyptic number.

28502223 is a deficient number, since it is larger than the sum of its proper divisors (11614257).

28502223 is a wasteful number, since it uses less digits than its factorization.

28502223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1438.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 28502223 is about 5338.7473249818. The cubic root of 28502223 is about 305.4636788572.

The spelling of 28502223 in words is "twenty-eight million, five hundred two thousand, two hundred twenty-three".