28131180 has 96 divisors (see below), whose sum is σ = 98219520. Its totient is φ = 5844480.

The previous prime is 28131179. The next prime is 28131199. The reversal of 28131180 is 8113182.

It is a self number, because there is not a number n which added to its sum of digits gives 28131180.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1576 + ... + 7664.

It is an arithmetic number, because the mean of its divisors is an integer number (1023120).

Almost surely, 2^28131180 is an apocalyptic number.

28131180 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 28131180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49109760).

28131180 is an abundant number, since it is smaller than the sum of its proper divisors (70088340).

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

28131180 is a wasteful number, since it uses less digits than its factorization.

28131180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6119 (or 6117 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 28131180 is about 5303.8834828831. The cubic root of 28131180 is about 304.1323725227.

It can be divided in two parts, 2813 and 1180, that added together give a palindrome (3993).

The spelling of 28131180 in words is "twenty-eight million, one hundred thirty-one thousand, one hundred eighty".