28988604 has 120 divisors (see below), whose sum is σ = 84767760. Its totient is φ = 8584704.

The previous prime is 28988593. The next prime is 28988611. The reversal of 28988604 is 40688982.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28988604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 104514 + ... + 104790.

It is an arithmetic number, because the mean of its divisors is an integer number (706398).

Almost surely, 2^28988604 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28988604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42383880).

28988604 is an abundant number, since it is smaller than the sum of its proper divisors (55779156).

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

28988604 is a wasteful number, since it uses less digits than its factorization.

28988604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 28988604 is about 5384.1066111287. The cubic root of 28988604 is about 307.1914334769.

It can be divided in two parts, 28988 and 604, that added together give a palindrome (29592).

The spelling of 28988604 in words is "twenty-eight million, nine hundred eighty-eight thousand, six hundred four".