181965028 has 36 divisors (see below), whose sum is σ = 371301420. Its totient is φ = 77801472.

The previous prime is 181964989. The next prime is 181965073. The reversal of 181965028 is 820569181.

It can be written as a sum of positive squares in 2 ways, for example, as 179506404 + 2458624 = 13398^2 + 1568^2 .

It is a super-2 number, since 2×181965028² = 66222542830081568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112288 + ... + 113896.

Almost surely, 2^181965028 is an apocalyptic number.

It is an amenable number.

181965028 is an abundant number, since it is smaller than the sum of its proper divisors (189336392).

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

181965028 is a wasteful number, since it uses less digits than its factorization.

181965028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2204 (or 2195 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 40.

The square root of 181965028 is about 13489.4413524060. The cubic root of 181965028 is about 566.6688102956.

The spelling of 181965028 in words is "one hundred eighty-one million, nine hundred sixty-five thousand, twenty-eight".