28726880 has 96 divisors (see below), whose sum is σ = 83571264. Its totient is φ = 9086976.

The previous prime is 28726877. The next prime is 28726883. The reversal of 28726880 is 8862782.

It is an interprime number because it is at equal distance from previous prime (28726877) and next prime (28726883).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28726883) 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, 13574 + ... + 15546.

It is an arithmetic number, because the mean of its divisors is an integer number (870534).

Almost surely, 2^28726880 is an apocalyptic number.

28726880 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 28726880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41785632).

28726880 is an abundant number, since it is smaller than the sum of its proper divisors (54844384).

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

28726880 is a wasteful number, since it uses less digits than its factorization.

28726880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2008 (or 2000 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 41.

The square root of 28726880 is about 5359.7462626509. The cubic root of 28726880 is about 306.2641431758.

The spelling of 28726880 in words is "twenty-eight million, seven hundred twenty-six thousand, eight hundred eighty".