28418880 has 112 divisors (see below), whose sum is σ = 103144320. Its totient is φ = 6494208.

The previous prime is 28418867. The next prime is 28418881. The reversal of 28418880 is 8881482.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28418881) 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, 4606 + ... + 8834.

Almost surely, 2^28418880 is an apocalyptic number.

28418880 is a gapful number since it is divisible by the number (20) 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 28418880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51572160).

28418880 is an abundant number, since it is smaller than the sum of its proper divisors (74725440).

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

28418880 is a wasteful number, since it uses less digits than its factorization.

28418880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4256 (or 4246 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 39.

The square root of 28418880 is about 5330.9361279235. The cubic root of 28418880 is about 305.1656539881.

The spelling of 28418880 in words is "twenty-eight million, four hundred eighteen thousand, eight hundred eighty".