81829752 has 16 divisors (see below), whose sum is σ = 204574440. Its totient is φ = 27276576.

The previous prime is 81829723. The next prime is 81829753. The reversal of 81829752 is 25792818.

It is a super-2 number, since 2×81829752² = 13392216624763008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81829753) 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, 1704763 + ... + 1704810.

Almost surely, 2^81829752 is an apocalyptic number.

It is an amenable number.

81829752 is an abundant number, since it is smaller than the sum of its proper divisors (122744688).

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

81829752 is a wasteful number, since it uses less digits than its factorization.

81829752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3409582 (or 3409578 counting only the distinct ones).

The product of its digits is 80640, while the sum is 42.

The square root of 81829752 is about 9045.9798805878. The cubic root of 81829752 is about 434.1472738802.

The spelling of 81829752 in words is "eighty-one million, eight hundred twenty-nine thousand, seven hundred fifty-two".