28126880 has 48 divisors (see below), whose sum is σ = 66769920. Its totient is φ = 11196672.

The previous prime is 28126877. The next prime is 28126883. The reversal of 28126880 is 8862182.

It is an interprime number because it is at equal distance from previous prime (28126877) and next prime (28126883).

It is a super-2 number, since 2×28126880² = 1582242757068800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28126880.

It is not an unprimeable number, because it can be changed into a prime (28126883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58481 + ... + 58959.

It is an arithmetic number, because the mean of its divisors is an integer number (1391040).

Almost surely, 2^28126880 is an apocalyptic number.

28126880 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 28126880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33384960).

28126880 is an abundant number, since it is smaller than the sum of its proper divisors (38643040).

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

28126880 is a wasteful number, since it uses less digits than its factorization.

28126880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861 (or 853 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 28126880 is about 5303.4781040370. The cubic root of 28126880 is about 304.1168756513.

The spelling of 28126880 in words is "twenty-eight million, one hundred twenty-six thousand, eight hundred eighty".