28623277 has 2 divisors, whose sum is σ = 28623278. Its totient is φ = 28623276.

The previous prime is 28623269. The next prime is 28623307. The reversal of 28623277 is 77232682.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27815076 + 808201 = 5274^2 + 899^2 .

It is a cyclic number.

It is not a de Polignac number, because 28623277 - 2³ = 28623269 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 (28629277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14311638 + 14311639.

It is an arithmetic number, because the mean of its divisors is an integer number (14311639).

Almost surely, 2^28623277 is an apocalyptic number.

It is an amenable number.

28623277 is a deficient number, since it is larger than the sum of its proper divisors (1).

28623277 is an equidigital number, since it uses as much as digits as its factorization.

28623277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 37.

The square root of 28623277 is about 5350.0726163296. The cubic root of 28623277 is about 305.8955208836.

It can be divided in two parts, 28623 and 277, that added together give a square (28900 = 170²).

The spelling of 28623277 in words is "twenty-eight million, six hundred twenty-three thousand, two hundred seventy-seven".