28251877 has 2 divisors, whose sum is σ = 28251878. Its totient is φ = 28251876.

The previous prime is 28251871. The next prime is 28251907. The reversal of 28251877 is 77815282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22268961 + 5982916 = 4719^2 + 2446^2 .

It is a cyclic number.

It is not a de Polignac number, because 28251877 - 2¹⁹ = 27727589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28251871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14125938 + 14125939.

It is an arithmetic number, because the mean of its divisors is an integer number (14125939).

Almost surely, 2^28251877 is an apocalyptic number.

It is an amenable number.

28251877 is a deficient number, since it is larger than the sum of its proper divisors (1).

28251877 is an equidigital number, since it uses as much as digits as its factorization.

28251877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62720, while the sum is 40.

The square root of 28251877 is about 5315.2494767414. The cubic root of 28251877 is about 304.5667125362.

The spelling of 28251877 in words is "twenty-eight million, two hundred fifty-one thousand, eight hundred seventy-seven".