28888704 has 128 divisors (see below), whose sum is σ = 91963200. Its totient is φ = 8875008.

The previous prime is 28888681. The next prime is 28888747. The reversal of 28888704 is 40788882.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 28888704.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44607 + ... + 45249.

Almost surely, 2^28888704 is an apocalyptic number.

28888704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28888704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45981600).

28888704 is an abundant number, since it is smaller than the sum of its proper divisors (63074496).

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

28888704 is a wasteful number, since it uses less digits than its factorization.

28888704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679 (or 661 counting only the distinct ones).

The product of its (nonzero) digits is 229376, while the sum is 45.

The square root of 28888704 is about 5374.8212993550. The cubic root of 28888704 is about 306.8381481597.

It can be divided in two parts, 28888 and 704, that added together give a palindrome (29592).

The spelling of 28888704 in words is "twenty-eight million, eight hundred eighty-eight thousand, seven hundred four".