28456180 has 24 divisors (see below), whose sum is σ = 59858568. Its totient is φ = 11363328.

The previous prime is 28456159. The next prime is 28456187. The reversal of 28456180 is 8165482.

It can be written as a sum of positive squares in 4 ways, for example, as 8421604 + 20034576 = 2902^2 + 4476^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28456187) 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 7 ways as a sum of consecutive naturals, for example, 21292 + ... + 22588.

It is an arithmetic number, because the mean of its divisors is an integer number (2494107).

Almost surely, 2^28456180 is an apocalyptic number.

28456180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28456180 is an abundant number, since it is smaller than the sum of its proper divisors (31402388).

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

28456180 is a wasteful number, since it uses less digits than its factorization.

28456180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2403 (or 2401 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 28456180 is about 5334.4334282096. The cubic root of 28456180 is about 305.2991063804.

It can be divided in two parts, 2845 and 6180, that added together give a square (9025 = 95²).

The spelling of 28456180 in words is "twenty-eight million, four hundred fifty-six thousand, one hundred eighty".