28654889 has 2 divisors, whose sum is σ = 28654890. Its totient is φ = 28654888.

The previous prime is 28654853. The next prime is 28654897. The reversal of 28654889 is 98845682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28270489 + 384400 = 5317^2 + 620^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28654889 is a prime.

It is a super-2 number, since 2×28654889² = 1642205327204642, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28654289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14327444 + 14327445.

It is an arithmetic number, because the mean of its divisors is an integer number (14327445).

Almost surely, 2^28654889 is an apocalyptic number.

It is an amenable number.

28654889 is a deficient number, since it is larger than the sum of its proper divisors (1).

28654889 is an equidigital number, since it uses as much as digits as its factorization.

28654889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1105920, while the sum is 50.

The square root of 28654889 is about 5353.0261534949. The cubic root of 28654889 is about 306.0080914032.

The spelling of 28654889 in words is "twenty-eight million, six hundred fifty-four thousand, eight hundred eighty-nine".