28777877 has 2 divisors, whose sum is σ = 28777878. Its totient is φ = 28777876.

The previous prime is 28777817. The next prime is 28777901. The reversal of 28777877 is 77877782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22193521 + 6584356 = 4711^2 + 2566^2 .

It is a cyclic number.

It is not a de Polignac number, because 28777877 - 2¹² = 28773781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28777817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14388938 + 14388939.

It is an arithmetic number, because the mean of its divisors is an integer number (14388939).

Almost surely, 2^28777877 is an apocalyptic number.

It is an amenable number.

28777877 is a deficient number, since it is larger than the sum of its proper divisors (1).

28777877 is an equidigital number, since it uses as much as digits as its factorization.

28777877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2151296, while the sum is 53.

The square root of 28777877 is about 5364.5015611891. The cubic root of 28777877 is about 306.4452664467.

The spelling of 28777877 in words is "twenty-eight million, seven hundred seventy-seven thousand, eight hundred seventy-seven".