28792661 has 2 divisors, whose sum is σ = 28792662. Its totient is φ = 28792660.

The previous prime is 28792639. The next prime is 28792667. The reversal of 28792661 is 16629782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28143025 + 649636 = 5305^2 + 806^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28792661 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28792667) by changing a digit.

It is a nontrivial repunit in base 73.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14396330 + 14396331.

It is an arithmetic number, because the mean of its divisors is an integer number (14396331).

Almost surely, 2^28792661 is an apocalyptic number.

It is an amenable number.

28792661 is a deficient number, since it is larger than the sum of its proper divisors (1).

28792661 is an equidigital number, since it uses as much as digits as its factorization.

28792661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 41.

The square root of 28792661 is about 5365.8793314796. The cubic root of 28792661 is about 306.4977339634.

The spelling of 28792661 in words is "twenty-eight million, seven hundred ninety-two thousand, six hundred sixty-one".