28695551 has 2 divisors, whose sum is σ = 28695552. Its totient is φ = 28695550.

The previous prime is 28695539. The next prime is 28695617. The reversal of 28695551 is 15559682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28695551 - 2¹⁸ = 28433407 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 28695499 and 28695508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28695851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14347775 + 14347776.

It is an arithmetic number, because the mean of its divisors is an integer number (14347776).

Almost surely, 2^28695551 is an apocalyptic number.

28695551 is a deficient number, since it is larger than the sum of its proper divisors (1).

28695551 is an equidigital number, since it uses as much as digits as its factorization.

28695551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108000, while the sum is 41.

The square root of 28695551 is about 5356.8228456801. The cubic root of 28695551 is about 306.1527673554.

The spelling of 28695551 in words is "twenty-eight million, six hundred ninety-five thousand, five hundred fifty-one".