28076889 has 16 divisors (see below), whose sum is σ = 39804480. Its totient is φ = 17553600.

The previous prime is 28076869. The next prime is 28076891. The reversal of 28076889 is 98867082.

It is a happy number.

It is not a de Polignac number, because 28076889 - 2¹¹ = 28074841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28076849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3319 + ... + 8195.

It is an arithmetic number, because the mean of its divisors is an integer number (2487780).

Almost surely, 2^28076889 is an apocalyptic number.

It is an amenable number.

28076889 is a deficient number, since it is larger than the sum of its proper divisors (11727591).

28076889 is a wasteful number, since it uses less digits than its factorization.

28076889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5000.

The product of its (nonzero) digits is 387072, while the sum is 48.

The square root of 28076889 is about 5298.7629688447. The cubic root of 28076889 is about 303.9365958778.

The spelling of 28076889 in words is "twenty-eight million, seventy-six thousand, eight hundred eighty-nine".