81182752 has 48 divisors (see below), whose sum is σ = 193415040. Its totient is φ = 32744448.

The previous prime is 81182723. The next prime is 81182767. The reversal of 81182752 is 25728118.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6852 + ... + 14467.

It is an arithmetic number, because the mean of its divisors is an integer number (4029480).

Almost surely, 2^81182752 is an apocalyptic number.

It is an amenable number.

81182752 is an abundant number, since it is smaller than the sum of its proper divisors (112232288).

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

81182752 is a wasteful number, since it uses less digits than its factorization.

81182752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21353 (or 21345 counting only the distinct ones).

The product of its digits is 8960, while the sum is 34.

The square root of 81182752 is about 9010.1471686094. The cubic root of 81182752 is about 433.0000266682. Note that the first 4 decimals are identical.

The spelling of 81182752 in words is "eighty-one million, one hundred eighty-two thousand, seven hundred fifty-two".