81768852 has 60 divisors (see below), whose sum is σ = 233202816. Its totient is φ = 24777360.

The previous prime is 81768847. The next prime is 81768923. The reversal of 81768852 is 25886718.

It is a super-2 number, since 2×81768852² = 13372290314795808, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 81768798 and 81768807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7908 + ... + 15035.

Almost surely, 2^81768852 is an apocalyptic number.

It is an amenable number.

81768852 is an abundant number, since it is smaller than the sum of its proper divisors (151433964).

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

81768852 is a wasteful number, since it uses less digits than its factorization.

81768852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22970 (or 22959 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The square root of 81768852 is about 9042.6131178991. The cubic root of 81768852 is about 434.0395456189.

The spelling of 81768852 in words is "eighty-one million, seven hundred sixty-eight thousand, eight hundred fifty-two".