28609751 has 2 divisors, whose sum is σ = 28609752. Its totient is φ = 28609750.

The previous prime is 28609727. The next prime is 28609813. The reversal of 28609751 is 15790682.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28609751 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 (28609151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14304875 + 14304876.

It is an arithmetic number, because the mean of its divisors is an integer number (14304876).

Almost surely, 2^28609751 is an apocalyptic number.

28609751 is a deficient number, since it is larger than the sum of its proper divisors (1).

28609751 is an equidigital number, since it uses as much as digits as its factorization.

28609751 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 28609751 is about 5348.8083719647. The cubic root of 28609751 is about 305.8473293980.

The spelling of 28609751 in words is "twenty-eight million, six hundred nine thousand, seven hundred fifty-one".