81896022 has 80 divisors (see below), whose sum is σ = 203158032. Its totient is φ = 24494400.

The previous prime is 81895973. The next prime is 81896051. The reversal of 81896022 is 22069818.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 77397 + ... + 78447.

Almost surely, 2^81896022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81896022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101579016).

81896022 is an abundant number, since it is smaller than the sum of its proper divisors (121262010).

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

81896022 is a wasteful number, since it uses less digits than its factorization.

81896022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115 (or 1106 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 81896022 is about 9049.6420923703. The cubic root of 81896022 is about 434.2644406233.

The spelling of 81896022 in words is "eighty-one million, eight hundred ninety-six thousand, twenty-two".