28802489 has 4 divisors (see below), whose sum is σ = 28813824. Its totient is φ = 28791156.

The previous prime is 28802483. The next prime is 28802491. The reversal of 28802489 is 98420882.

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 a de Polignac number, because none of the positive numbers 2^k-28802489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28802483) 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, 104 + ... + 7590.

It is an arithmetic number, because the mean of its divisors is an integer number (7203456).

Almost surely, 2^28802489 is an apocalyptic number.

It is an amenable number.

28802489 is a deficient number, since it is larger than the sum of its proper divisors (11335).

28802489 is an equidigital number, since it uses as much as digits as its factorization.

28802489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11334.

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 28802489 is about 5366.7950398725. The cubic root of 28802489 is about 306.5326030002.

The spelling of 28802489 in words is "twenty-eight million, eight hundred two thousand, four hundred eighty-nine".