28022663 has 4 divisors (see below), whose sum is σ = 29497560. Its totient is φ = 26547768.

The previous prime is 28022651. The next prime is 28022689. The reversal of 28022663 is 36622082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28022663 - 2¹⁰ = 28021639 is a prime.

It is a super-2 number, since 2×28022663² = 1570539283223138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28022623) 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, 737420 + ... + 737457.

It is an arithmetic number, because the mean of its divisors is an integer number (7374390).

Almost surely, 2^28022663 is an apocalyptic number.

28022663 is a deficient number, since it is larger than the sum of its proper divisors (1474897).

28022663 is a wasteful number, since it uses less digits than its factorization.

28022663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1474896.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 28022663 is about 5293.6436411984. The cubic root of 28022663 is about 303.7408015414.

The spelling of 28022663 in words is "twenty-eight million, twenty-two thousand, six hundred sixty-three".