28269893 has 4 divisors (see below), whose sum is σ = 28308288. Its totient is φ = 28231500.

The previous prime is 28269881. The next prime is 28269911. The reversal of 28269893 is 39896282.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39896282 = 2 ⋅19948141.

It is a cyclic number.

It is not a de Polignac number, because 28269893 - 2¹⁶ = 28204357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28269803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18071 + ... + 19572.

It is an arithmetic number, because the mean of its divisors is an integer number (7077072).

Almost surely, 2^28269893 is an apocalyptic number.

It is an amenable number.

28269893 is a deficient number, since it is larger than the sum of its proper divisors (38395).

28269893 is an equidigital number, since it uses as much as digits as its factorization.

28269893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38394.

The product of its digits is 373248, while the sum is 47.

The square root of 28269893 is about 5316.9439530618. The cubic root of 28269893 is about 304.6314387130.

The spelling of 28269893 in words is "twenty-eight million, two hundred sixty-nine thousand, eight hundred ninety-three".