28685351 has 2 divisors, whose sum is σ = 28685352. Its totient is φ = 28685350.

The previous prime is 28685339. The next prime is 28685359. The reversal of 28685351 is 15358682.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28685351 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28685359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14342675 + 14342676.

It is an arithmetic number, because the mean of its divisors is an integer number (14342676).

Almost surely, 2^28685351 is an apocalyptic number.

28685351 is a deficient number, since it is larger than the sum of its proper divisors (1).

28685351 is an equidigital number, since it uses as much as digits as its factorization.

28685351 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57600, while the sum is 38.

The square root of 28685351 is about 5355.8707041899. The cubic root of 28685351 is about 306.1164884644.

The spelling of 28685351 in words is "twenty-eight million, six hundred eighty-five thousand, three hundred fifty-one".