181047936 has 128 divisors (see below), whose sum is σ = 506050560. Its totient is φ = 57277440.

The previous prime is 181047929. The next prime is 181047949. The reversal of 181047936 is 639740181.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 181047894 and 181047903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 797455 + ... + 797681.

It is an arithmetic number, because the mean of its divisors is an integer number (3953520).

Almost surely, 2^181047936 is an apocalyptic number.

181047936 is a gapful number since it is divisible by the number (16) 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 181047936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253025280).

181047936 is an abundant number, since it is smaller than the sum of its proper divisors (325002624).

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

181047936 is a wasteful number, since it uses less digits than its factorization.

181047936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342 (or 330 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 181047936 is about 13455.4054565442. The cubic root of 181047936 is about 565.7152150640.

The spelling of 181047936 in words is "one hundred eighty-one million, forty-seven thousand, nine hundred thirty-six".