28254680 has 64 divisors (see below), whose sum is σ = 69193440. Its totient is φ = 10340352.

The previous prime is 28254679. The next prime is 28254683. The reversal of 28254680 is 8645282.

It is a self number, because there is not a number n which added to its sum of digits gives 28254680.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28254683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24599 + ... + 25721.

Almost surely, 2^28254680 is an apocalyptic number.

28254680 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 28254680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34596720).

28254680 is an abundant number, since it is smaller than the sum of its proper divisors (40938760).

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

28254680 is a wasteful number, since it uses less digits than its factorization.

28254680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188 (or 1184 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 28254680 is about 5315.5131455016. The cubic root of 28254680 is about 304.5767846961.

The spelling of 28254680 in words is "twenty-eight million, two hundred fifty-four thousand, six hundred eighty".