28552091 has 2 divisors, whose sum is σ = 28552092. Its totient is φ = 28552090.

The previous prime is 28552081. The next prime is 28552103. The reversal of 28552091 is 19025582.

28552091 is nontrivially palindromic in base 2.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28552091 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28552081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14276045 + 14276046.

It is an arithmetic number, because the mean of its divisors is an integer number (14276046).

Almost surely, 2^28552091 is an apocalyptic number.

28552091 is a deficient number, since it is larger than the sum of its proper divisors (1).

28552091 is an equidigital number, since it uses as much as digits as its factorization.

28552091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 28552091 is about 5343.4156679038. The cubic root of 28552091 is about 305.6417233026.

The spelling of 28552091 in words is "twenty-eight million, five hundred fifty-two thousand, ninety-one".