28990877 has 2 divisors, whose sum is σ = 28990878. Its totient is φ = 28990876.

The previous prime is 28990861. The next prime is 28990891. The reversal of 28990877 is 77809982.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18369796 + 10621081 = 4286^2 + 3259^2 .

It is a cyclic number.

It is not a de Polignac number, because 28990877 - 2⁴ = 28990861 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 (28990837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14495438 + 14495439.

It is an arithmetic number, because the mean of its divisors is an integer number (14495439).

Almost surely, 2^28990877 is an apocalyptic number.

It is an amenable number.

28990877 is a deficient number, since it is larger than the sum of its proper divisors (1).

28990877 is an equidigital number, since it uses as much as digits as its factorization.

28990877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 50.

The square root of 28990877 is about 5384.3176912214. The cubic root of 28990877 is about 307.1994622398.

The spelling of 28990877 in words is "twenty-eight million, nine hundred ninety thousand, eight hundred seventy-seven".