28747180 has 72 divisors (see below), whose sum is σ = 75880224. Its totient is φ = 8954880.

The previous prime is 28747163. The next prime is 28747189. The reversal of 28747180 is 8174782.

It is not an unprimeable number, because it can be changed into a prime (28747189) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16092 + ... + 17788.

It is an arithmetic number, because the mean of its divisors is an integer number (1053892).

Almost surely, 2^28747180 is an apocalyptic number.

28747180 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 28747180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37940112).

28747180 is an abundant number, since it is smaller than the sum of its proper divisors (47133044).

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

28747180 is a wasteful number, since it uses less digits than its factorization.

28747180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1735 (or 1722 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 28747180 is about 5361.6396745772. The cubic root of 28747180 is about 306.3362672424.

The spelling of 28747180 in words is "twenty-eight million, seven hundred forty-seven thousand, one hundred eighty".