28263577 has 2 divisors, whose sum is σ = 28263578. Its totient is φ = 28263576.

The previous prime is 28263553. The next prime is 28263589. The reversal of 28263577 is 77536282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28259856 + 3721 = 5316^2 + 61^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28263577 is a prime.

It is a super-3 number, since 3×28263577³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (28263377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14131788 + 14131789.

It is an arithmetic number, because the mean of its divisors is an integer number (14131789).

Almost surely, 2^28263577 is an apocalyptic number.

It is an amenable number.

28263577 is a deficient number, since it is larger than the sum of its proper divisors (1).

28263577 is an equidigital number, since it uses as much as digits as its factorization.

28263577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 40.

The square root of 28263577 is about 5316.3499696690. The cubic root of 28263577 is about 304.6087503182.

The spelling of 28263577 in words is "twenty-eight million, two hundred sixty-three thousand, five hundred seventy-seven".