28689498 has 16 divisors (see below), whose sum is σ = 63754560. Its totient is φ = 9563148.

The previous prime is 28689481. The next prime is 28689499. The reversal of 28689498 is 89498682.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 531287 = 28689498 / (2 + 8 + 6 + 8 + 9 + 4 + 9 + 8).

It is not an unprimeable number, because it can be changed into a prime (28689499) 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 7 ways as a sum of consecutive naturals, for example, 265590 + ... + 265697.

It is an arithmetic number, because the mean of its divisors is an integer number (3984660).

Almost surely, 2^28689498 is an apocalyptic number.

28689498 is an abundant number, since it is smaller than the sum of its proper divisors (35065062).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28689498 is a wasteful number, since it uses less digits than its factorization.

28689498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531298 (or 531292 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 54.

The square root of 28689498 is about 5356.2578354668. The cubic root of 28689498 is about 306.1312393606.

The spelling of 28689498 in words is "twenty-eight million, six hundred eighty-nine thousand, four hundred ninety-eight".