28655441 has 2 divisors, whose sum is σ = 28655442. Its totient is φ = 28655440.

The previous prime is 28655437. The next prime is 28655443. The reversal of 28655441 is 14455682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27040000 + 1615441 = 5200^2 + 1271^2 .

It is a cyclic number.

It is not a de Polignac number, because 28655441 - 2² = 28655437 is a prime.

It is a super-2 number, since 2×28655441² = 1642268597808962, which contains 22 as substring.

Together with 28655443, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28655443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14327720 + 14327721.

It is an arithmetic number, because the mean of its divisors is an integer number (14327721).

Almost surely, 2^28655441 is an apocalyptic number.

It is an amenable number.

28655441 is a deficient number, since it is larger than the sum of its proper divisors (1).

28655441 is an equidigital number, since it uses as much as digits as its factorization.

28655441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38400, while the sum is 35.

The square root of 28655441 is about 5353.0777128676. The cubic root of 28655441 is about 306.0100563429.

The spelling of 28655441 in words is "twenty-eight million, six hundred fifty-five thousand, four hundred forty-one".