28602489 has 4 divisors (see below), whose sum is σ = 38136656. Its totient is φ = 19068324.

The previous prime is 28602481. The next prime is 28602499. The reversal of 28602489 is 98420682.

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.

It is not a de Polignac number, because 28602489 - 2³ = 28602481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28602481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4767079 + ... + 4767084.

It is an arithmetic number, because the mean of its divisors is an integer number (9534164).

Almost surely, 2^28602489 is an apocalyptic number.

It is an amenable number.

28602489 is a deficient number, since it is larger than the sum of its proper divisors (9534167).

28602489 is an equidigital number, since it uses as much as digits as its factorization.

28602489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9534166.

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 28602489 is about 5348.1294860914. The cubic root of 28602489 is about 305.8214495123.

The spelling of 28602489 in words is "twenty-eight million, six hundred two thousand, four hundred eighty-nine".