28654789 has 2 divisors, whose sum is σ = 28654790. Its totient is φ = 28654788.

The previous prime is 28654781. The next prime is 28654799. The reversal of 28654789 is 98745682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17994564 + 10660225 = 4242^2 + 3265^2 .

It is a cyclic number.

It is not a de Polignac number, because 28654789 - 2³ = 28654781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28654781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14327394 + 14327395.

It is an arithmetic number, because the mean of its divisors is an integer number (14327395).

Almost surely, 2^28654789 is an apocalyptic number.

It is an amenable number.

28654789 is a deficient number, since it is larger than the sum of its proper divisors (1).

28654789 is an equidigital number, since it uses as much as digits as its factorization.

28654789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 49.

The square root of 28654789 is about 5353.0168129757. The cubic root of 28654789 is about 306.0077354332.

The spelling of 28654789 in words is "twenty-eight million, six hundred fifty-four thousand, seven hundred eighty-nine".