28795561 has 2 divisors, whose sum is σ = 28795562. Its totient is φ = 28795560.

The previous prime is 28795553. The next prime is 28795567. The reversal of 28795561 is 16559782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26010000 + 2785561 = 5100^2 + 1669^2 .

It is a cyclic number.

It is not a de Polignac number, because 28795561 - 2³ = 28795553 is a prime.

It is not a weakly prime, because it can be changed into another prime (28795567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14397780 + 14397781.

It is an arithmetic number, because the mean of its divisors is an integer number (14397781).

Almost surely, 2^28795561 is an apocalyptic number.

It is an amenable number.

28795561 is a deficient number, since it is larger than the sum of its proper divisors (1).

28795561 is an equidigital number, since it uses as much as digits as its factorization.

28795561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 43.

The square root of 28795561 is about 5366.1495506555. The cubic root of 28795561 is about 306.5080237799.

The spelling of 28795561 in words is "twenty-eight million, seven hundred ninety-five thousand, five hundred sixty-one".