28552291 has 2 divisors, whose sum is σ = 28552292. Its totient is φ = 28552290.

The previous prime is 28552273. The next prime is 28552297. The reversal of 28552291 is 19225582.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28552291 - 2⁹ = 28551779 is a prime.

It is not a weakly prime, because it can be changed into another prime (28552297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14276145 + 14276146.

It is an arithmetic number, because the mean of its divisors is an integer number (14276146).

Almost surely, 2^28552291 is an apocalyptic number.

28552291 is a deficient number, since it is larger than the sum of its proper divisors (1).

28552291 is an equidigital number, since it uses as much as digits as its factorization.

28552291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 34.

The square root of 28552291 is about 5343.4343824922. The cubic root of 28552291 is about 305.6424369480.

The spelling of 28552291 in words is "twenty-eight million, five hundred fifty-two thousand, two hundred ninety-one".