28253777 has 2 divisors, whose sum is σ = 28253778. Its totient is φ = 28253776.

The previous prime is 28253759. The next prime is 28253789. The reversal of 28253777 is 77735282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27888961 + 364816 = 5281^2 + 604^2 .

It is a cyclic number.

It is not a de Polignac number, because 28253777 - 2⁶ = 28253713 is a prime.

It is not a weakly prime, because it can be changed into another prime (28253747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14126888 + 14126889.

It is an arithmetic number, because the mean of its divisors is an integer number (14126889).

Almost surely, 2^28253777 is an apocalyptic number.

It is an amenable number.

28253777 is a deficient number, since it is larger than the sum of its proper divisors (1).

28253777 is an equidigital number, since it uses as much as digits as its factorization.

28253777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 164640, while the sum is 41.

The square root of 28253777 is about 5315.4282047639. The cubic root of 28253777 is about 304.5735399738.

The spelling of 28253777 in words is "twenty-eight million, two hundred fifty-three thousand, seven hundred seventy-seven".