28053569 has 2 divisors, whose sum is σ = 28053570. Its totient is φ = 28053568.

The previous prime is 28053563. The next prime is 28053577. The reversal of 28053569 is 96535082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21977344 + 6076225 = 4688^2 + 2465^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28053569 is a prime.

It is a super-2 number, since 2×28053569² = 1574005467275522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28053563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14026784 + 14026785.

It is an arithmetic number, because the mean of its divisors is an integer number (14026785).

Almost surely, 2^28053569 is an apocalyptic number.

It is an amenable number.

28053569 is a deficient number, since it is larger than the sum of its proper divisors (1).

28053569 is an equidigital number, since it uses as much as digits as its factorization.

28053569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 28053569 is about 5296.5619981267. The cubic root of 28053569 is about 303.8524250539.

The spelling of 28053569 in words is "twenty-eight million, fifty-three thousand, five hundred sixty-nine".