181858056 has 64 divisors (see below), whose sum is σ = 479001600. Its totient is φ = 57423168.

The previous prime is 181858049. The next prime is 181858057. The reversal of 181858056 is 650858181.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 181857999 and 181858017.

It is not an unprimeable number, because it can be changed into a prime (181858057) 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, 57525 + ... + 60603.

It is an arithmetic number, because the mean of its divisors is an integer number (7484400).

Almost surely, 2^181858056 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 181858056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239500800).

181858056 is an abundant number, since it is smaller than the sum of its proper divisors (297143544).

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

181858056 is a wasteful number, since it uses less digits than its factorization.

181858056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3218 (or 3214 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 42.

The square root of 181858056 is about 13485.4757424423. The cubic root of 181858056 is about 566.5577457704.

The spelling of 181858056 in words is "one hundred eighty-one million, eight hundred fifty-eight thousand, fifty-six".