81702132 has 24 divisors (see below), whose sum is σ = 192528672. Its totient is φ = 26964000.

The previous prime is 81702113. The next prime is 81702139. The reversal of 81702132 is 23120718.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81702139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32494 + ... + 34917.

It is an arithmetic number, because the mean of its divisors is an integer number (8022028).

Almost surely, 2^81702132 is an apocalyptic number.

It is an amenable number.

81702132 is an abundant number, since it is smaller than the sum of its proper divisors (110826540).

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

81702132 is a wasteful number, since it uses less digits than its factorization.

81702132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67519 (or 67517 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 81702132 is about 9038.9231659529. The cubic root of 81702132 is about 433.9214607254.

The spelling of 81702132 in words is "eighty-one million, seven hundred two thousand, one hundred thirty-two".