28294687 has 2 divisors, whose sum is σ = 28294688. Its totient is φ = 28294686.

The previous prime is 28294657. The next prime is 28294699. The reversal of 28294687 is 78649282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28294687 - 2¹⁹ = 27770399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28294657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14147343 + 14147344.

It is an arithmetic number, because the mean of its divisors is an integer number (14147344).

Almost surely, 2^28294687 is an apocalyptic number.

28294687 is a deficient number, since it is larger than the sum of its proper divisors (1).

28294687 is an equidigital number, since it uses as much as digits as its factorization.

28294687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 46.

The square root of 28294687 is about 5319.2750445902. The cubic root of 28294687 is about 304.7204712967.

The spelling of 28294687 in words is "twenty-eight million, two hundred ninety-four thousand, six hundred eighty-seven".