28898688 has 128 divisors (see below), whose sum is σ = 94590720. Its totient is φ = 7612416.

The previous prime is 28898687. The next prime is 28898693. The reversal of 28898688 is 88689882.

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

Its product of digits (3538944) is a multiple of the sum of its prime factors (864).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28898687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34531 + ... + 35357.

It is an arithmetic number, because the mean of its divisors is an integer number (738990).

Almost surely, 2^28898688 is an apocalyptic number.

28898688 is a gapful number since it is divisible by the number (28) 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 28898688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47295360).

28898688 is an abundant number, since it is smaller than the sum of its proper divisors (65692032).

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

28898688 is a wasteful number, since it uses less digits than its factorization.

28898688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864 (or 852 counting only the distinct ones).

The product of its digits is 3538944, while the sum is 57.

The square root of 28898688 is about 5375.7499941869. The cubic root of 28898688 is about 306.8734920693.

The spelling of 28898688 in words is "twenty-eight million, eight hundred ninety-eight thousand, six hundred eighty-eight".