28529251 has 2 divisors, whose sum is σ = 28529252. Its totient is φ = 28529250.

The previous prime is 28529239. The next prime is 28529261. The reversal of 28529251 is 15292582.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28529251 - 2²³ = 20140643 is a prime.

It is not a weakly prime, because it can be changed into another prime (28529261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14264625 + 14264626.

It is an arithmetic number, because the mean of its divisors is an integer number (14264626).

Almost surely, 2^28529251 is an apocalyptic number.

28529251 is a deficient number, since it is larger than the sum of its proper divisors (1).

28529251 is an equidigital number, since it uses as much as digits as its factorization.

28529251 is an odious number, because the sum of its binary digits is odd.

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

The square root of 28529251 is about 5341.2780305841. The cubic root of 28529251 is about 305.5602030710.

The spelling of 28529251 in words is "twenty-eight million, five hundred twenty-nine thousand, two hundred fifty-one".