81342632 has 32 divisors (see below), whose sum is σ = 175094400. Its totient is φ = 34703424.

The previous prime is 81342631. The next prime is 81342649. The reversal of 81342632 is 23624318.

It is a junction number, because it is equal to n+sod(n) for n = 81342595 and 81342604.

It is not an unprimeable number, because it can be changed into a prime (81342631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9653 + ... + 15995.

It is an arithmetic number, because the mean of its divisors is an integer number (5471700).

Almost surely, 2^81342632 is an apocalyptic number.

It is an amenable number.

81342632 is an abundant number, since it is smaller than the sum of its proper divisors (93751768).

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

81342632 is a wasteful number, since it uses less digits than its factorization.

81342632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6585 (or 6581 counting only the distinct ones).

The product of its digits is 6912, while the sum is 29.

The square root of 81342632 is about 9019.0150238260. The cubic root of 81342632 is about 433.2840880264.

The spelling of 81342632 in words is "eighty-one million, three hundred forty-two thousand, six hundred thirty-two".