81762996 has 96 divisors (see below), whose sum is σ = 238436352. Its totient is φ = 21265920.

The previous prime is 81762959. The next prime is 81763037. The reversal of 81762996 is 69926718.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43345 + ... + 45191.

It is an arithmetic number, because the mean of its divisors is an integer number (2483712).

Almost surely, 2^81762996 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 81762996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119218176).

81762996 is an abundant number, since it is smaller than the sum of its proper divisors (156673356).

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

81762996 is a wasteful number, since it uses less digits than its factorization.

81762996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1909 (or 1907 counting only the distinct ones).

The product of its digits is 326592, while the sum is 48.

The square root of 81762996 is about 9042.2893118944. The cubic root of 81762996 is about 434.0291839054.

The spelling of 81762996 in words is "eighty-one million, seven hundred sixty-two thousand, nine hundred ninety-six".