28086623 has 4 divisors (see below), whose sum is σ = 28104648. Its totient is φ = 28068600.

The previous prime is 28086607. The next prime is 28086631. The reversal of 28086623 is 32668082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32668082 = 2 ⋅16334041.

It is a cyclic number.

It is not a de Polignac number, because 28086623 - 2⁴ = 28086607 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 (28086523) 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, 6428 + ... + 9873.

It is an arithmetic number, because the mean of its divisors is an integer number (7026162).

Almost surely, 2^28086623 is an apocalyptic number.

28086623 is a deficient number, since it is larger than the sum of its proper divisors (18025).

28086623 is a wasteful number, since it uses less digits than its factorization.

28086623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18024.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 28086623 is about 5299.6814055186. The cubic root of 28086623 is about 303.9717158300.

The spelling of 28086623 in words is "twenty-eight million, eighty-six thousand, six hundred twenty-three".