28552889 has 4 divisors (see below), whose sum is σ = 28564560. Its totient is φ = 28541220.

The previous prime is 28552879. The next prime is 28552897. The reversal of 28552889 is 98825582.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28552889 - 2⁸ = 28552633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28552859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 599 + ... + 7580.

It is an arithmetic number, because the mean of its divisors is an integer number (7141140).

Almost surely, 2^28552889 is an apocalyptic number.

It is an amenable number.

28552889 is a deficient number, since it is larger than the sum of its proper divisors (11671).

28552889 is an equidigital number, since it uses as much as digits as its factorization.

28552889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11670.

The product of its digits is 460800, while the sum is 47.

The square root of 28552889 is about 5343.4903387206. The cubic root of 28552889 is about 305.6445707278.

The spelling of 28552889 in words is "twenty-eight million, five hundred fifty-two thousand, eight hundred eighty-nine".