28715503 has 2 divisors, whose sum is σ = 28715504. Its totient is φ = 28715502.

The previous prime is 28715471. The next prime is 28715507. The reversal of 28715503 is 30551782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28715503 - 2⁵ = 28715471 is a prime.

It is a super-2 number, since 2×28715503² = 1649160225086018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28715507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14357751 + 14357752.

It is an arithmetic number, because the mean of its divisors is an integer number (14357752).

Almost surely, 2^28715503 is an apocalyptic number.

28715503 is a deficient number, since it is larger than the sum of its proper divisors (1).

28715503 is an equidigital number, since it uses as much as digits as its factorization.

28715503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 28715503 is about 5358.6848199908. The cubic root of 28715503 is about 306.2237068639.

The spelling of 28715503 in words is "twenty-eight million, seven hundred fifteen thousand, five hundred three".