28876261 has 2 divisors, whose sum is σ = 28876262. Its totient is φ = 28876260.

The previous prime is 28876229. The next prime is 28876271. The reversal of 28876261 is 16267882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27363361 + 1512900 = 5231^2 + 1230^2 .

It is a cyclic number.

It is not a de Polignac number, because 28876261 - 2⁵ = 28876229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28876271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14438130 + 14438131.

It is an arithmetic number, because the mean of its divisors is an integer number (14438131).

Almost surely, 2^28876261 is an apocalyptic number.

It is an amenable number.

28876261 is a deficient number, since it is larger than the sum of its proper divisors (1).

28876261 is an equidigital number, since it uses as much as digits as its factorization.

28876261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 40.

The square root of 28876261 is about 5373.6636478291. The cubic root of 28876261 is about 306.7940878542.

The spelling of 28876261 in words is "twenty-eight million, eight hundred seventy-six thousand, two hundred sixty-one".