28046569 has 2 divisors, whose sum is σ = 28046570. Its totient is φ = 28046568.

The previous prime is 28046563. The next prime is 28046573. The reversal of 28046569 is 96564082.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25603600 + 2442969 = 5060^2 + 1563^2 .

It is a cyclic number.

It is not a de Polignac number, because 28046569 - 2³ = 28046561 is a prime.

It is a super-2 number, since 2×28046569² = 1573220065343522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28046561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14023284 + 14023285.

It is an arithmetic number, because the mean of its divisors is an integer number (14023285).

Almost surely, 2^28046569 is an apocalyptic number.

It is an amenable number.

28046569 is a deficient number, since it is larger than the sum of its proper divisors (1).

28046569 is an equidigital number, since it uses as much as digits as its factorization.

28046569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 28046569 is about 5295.9011508902. The cubic root of 28046569 is about 303.8271502673.

The spelling of 28046569 in words is "twenty-eight million, forty-six thousand, five hundred sixty-nine".