28251049 has 2 divisors, whose sum is σ = 28251050. Its totient is φ = 28251048.

The previous prime is 28251037. The next prime is 28251053. The reversal of 28251049 is 94015282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20025625 + 8225424 = 4475^2 + 2868^2 .

It is a cyclic number.

It is not a de Polignac number, because 28251049 - 2¹⁹ = 27726761 is a prime.

It is a super-3 number, since 3×28251049³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28251049.

It is not a weakly prime, because it can be changed into another prime (28251079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14125524 + 14125525.

It is an arithmetic number, because the mean of its divisors is an integer number (14125525).

Almost surely, 2^28251049 is an apocalyptic number.

It is an amenable number.

28251049 is a deficient number, since it is larger than the sum of its proper divisors (1).

28251049 is an equidigital number, since it uses as much as digits as its factorization.

28251049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 28251049 is about 5315.1715870704. The cubic root of 28251049 is about 304.5637371150.

The spelling of 28251049 in words is "twenty-eight million, two hundred fifty-one thousand, forty-nine".