56181328 has 80 divisors (see below), whose sum is σ = 138741120. Its totient is φ = 21454848.

The previous prime is 56181319. The next prime is 56181329. The reversal of 56181328 is 82318165.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 56181293 and 56181302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56181329) 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, 35400 + ... + 36952.

It is an arithmetic number, because the mean of its divisors is an integer number (1734264).

Almost surely, 2^56181328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56181328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69370560).

56181328 is an abundant number, since it is smaller than the sum of its proper divisors (82559792).

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

56181328 is a wasteful number, since it uses less digits than its factorization.

56181328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1604 (or 1598 counting only the distinct ones).

The product of its digits is 11520, while the sum is 34.

The square root of 56181328 is about 7495.4204685261. The cubic root of 56181328 is about 382.9987297347.

The spelling of 56181328 in words is "fifty-six million, one hundred eighty-one thousand, three hundred twenty-eight".