28877293 has 2 divisors, whose sum is σ = 28877294. Its totient is φ = 28877292.

The previous prime is 28877273. The next prime is 28877297. The reversal of 28877293 is 39277882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23011209 + 5866084 = 4797^2 + 2422^2 .

It is a cyclic number.

It is not a de Polignac number, because 28877293 - 2⁹ = 28876781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28877297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14438646 + 14438647.

It is an arithmetic number, because the mean of its divisors is an integer number (14438647).

Almost surely, 2^28877293 is an apocalyptic number.

It is an amenable number.

28877293 is a deficient number, since it is larger than the sum of its proper divisors (1).

28877293 is an equidigital number, since it uses as much as digits as its factorization.

28877293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 46.

The square root of 28877293 is about 5373.7596708450. The cubic root of 28877293 is about 306.7977426178.

The spelling of 28877293 in words is "twenty-eight million, eight hundred seventy-seven thousand, two hundred ninety-three".