28250880 has 144 divisors (see below), whose sum is σ = 103213824. Its totient is φ = 6451200.

The previous prime is 28250879. The next prime is 28250881. The reversal of 28250880 is 8805282.

It is an interprime number because it is at equal distance from previous prime (28250879) and next prime (28250881).

It is a super-2 number, since 2×28250880² = 1596224441548800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28250881) 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, 26355 + ... + 27405.

Almost surely, 2^28250880 is an apocalyptic number.

28250880 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 28250880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51606912).

28250880 is an abundant number, since it is smaller than the sum of its proper divisors (74962944).

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

28250880 is a wasteful number, since it uses less digits than its factorization.

28250880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082 (or 1068 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 33.

The square root of 28250880 is about 5315.1556891591. The cubic root of 28250880 is about 304.5631298057.

The spelling of 28250880 in words is "twenty-eight million, two hundred fifty thousand, eight hundred eighty".