28665503 has 2 divisors, whose sum is σ = 28665504. Its totient is φ = 28665502.

The previous prime is 28665499. The next prime is 28665529. The reversal of 28665503 is 30556682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28665503 - 2² = 28665499 is a prime.

It is a super-2 number, since 2×28665503² = 1643422124486018, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28667503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14332751 + 14332752.

It is an arithmetic number, because the mean of its divisors is an integer number (14332752).

Almost surely, 2^28665503 is an apocalyptic number.

28665503 is a deficient number, since it is larger than the sum of its proper divisors (1).

28665503 is an equidigital number, since it uses as much as digits as its factorization.

28665503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 28665503 is about 5354.0174635502. The cubic root of 28665503 is about 306.0458693538.

The spelling of 28665503 in words is "twenty-eight million, six hundred sixty-five thousand, five hundred three".