28690877 has 2 divisors, whose sum is σ = 28690878. Its totient is φ = 28690876.

The previous prime is 28690819. The next prime is 28690897. The reversal of 28690877 is 77809682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18887716 + 9803161 = 4346^2 + 3131^2 .

It is a cyclic number.

It is not a de Polignac number, because 28690877 - 2¹⁴ = 28674493 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28690897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14345438 + 14345439.

It is an arithmetic number, because the mean of its divisors is an integer number (14345439).

Almost surely, 2^28690877 is an apocalyptic number.

It is an amenable number.

28690877 is a deficient number, since it is larger than the sum of its proper divisors (1).

28690877 is an equidigital number, since it uses as much as digits as its factorization.

28690877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 47.

The square root of 28690877 is about 5356.3865618531. The cubic root of 28690877 is about 306.1361441544.

The spelling of 28690877 in words is "twenty-eight million, six hundred ninety thousand, eight hundred seventy-seven".