28702691 has 2 divisors, whose sum is σ = 28702692. Its totient is φ = 28702690.

The previous prime is 28702679. The next prime is 28702693. The reversal of 28702691 is 19620782.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28702691 - 2¹⁰ = 28701667 is a prime.

Together with 28702693, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28702693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14351345 + 14351346.

It is an arithmetic number, because the mean of its divisors is an integer number (14351346).

Almost surely, 2^28702691 is an apocalyptic number.

28702691 is a deficient number, since it is larger than the sum of its proper divisors (1).

28702691 is an equidigital number, since it uses as much as digits as its factorization.

28702691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 28702691 is about 5357.4892440396. The cubic root of 28702691 is about 306.1781574642.

The spelling of 28702691 in words is "twenty-eight million, seven hundred two thousand, six hundred ninety-one".