181268072 has 16 divisors (see below), whose sum is σ = 340216800. Its totient is φ = 90543600.

The previous prime is 181268063. The next prime is 181268077. The reversal of 181268072 is 270862181.

It is a super-2 number, since 2×181268072² = 65716227853194368, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (181268077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2372 + ... + 19187.

It is an arithmetic number, because the mean of its divisors is an integer number (21263550).

Almost surely, 2^181268072 is an apocalyptic number.

It is an amenable number.

181268072 is a deficient number, since it is larger than the sum of its proper divisors (158948728).

181268072 is a wasteful number, since it uses less digits than its factorization.

181268072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22616 (or 22612 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 181268072 is about 13463.5831783370. The cubic root of 181268072 is about 565.9444063815.

The spelling of 181268072 in words is "one hundred eighty-one million, two hundred sixty-eight thousand, seventy-two".