81762792 has 64 divisors (see below), whose sum is σ = 225866880. Its totient is φ = 24532992.

The previous prime is 81762767. The next prime is 81762797. The reversal of 81762792 is 29726718.

It is not an unprimeable number, because it can be changed into a prime (81762797) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5028 + ... + 13740.

It is an arithmetic number, because the mean of its divisors is an integer number (3529170).

Almost surely, 2^81762792 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81762792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112933440).

81762792 is an abundant number, since it is smaller than the sum of its proper divisors (144104088).

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

81762792 is a wasteful number, since it uses less digits than its factorization.

81762792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8762 (or 8758 counting only the distinct ones).

The product of its digits is 84672, while the sum is 42.

The square root of 81762792 is about 9042.2780315582. The cubic root of 81762792 is about 434.0288229352.

The spelling of 81762792 in words is "eighty-one million, seven hundred sixty-two thousand, seven hundred ninety-two".