28268623 has 2 divisors, whose sum is σ = 28268624. Its totient is φ = 28268622.

The previous prime is 28268609. The next prime is 28268677. The reversal of 28268623 is 32686282.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28268623 - 2¹³ = 28260431 is a prime.

It is a super-2 number, since 2×28268623² = 1598230092632258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28268693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14134311 + 14134312.

It is an arithmetic number, because the mean of its divisors is an integer number (14134312).

Almost surely, 2^28268623 is an apocalyptic number.

28268623 is a deficient number, since it is larger than the sum of its proper divisors (1).

28268623 is an equidigital number, since it uses as much as digits as its factorization.

28268623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 37.

The square root of 28268623 is about 5316.8245222125. The cubic root of 28268623 is about 304.6268768785.

It can be divided in two parts, 2826 and 8623, that added together give a square (11449 = 107²).

The spelling of 28268623 in words is "twenty-eight million, two hundred sixty-eight thousand, six hundred twenty-three".