81802296 has 48 divisors (see below), whose sum is σ = 233212200. Its totient is φ = 25831872.

The previous prime is 81802271. The next prime is 81802307. The reversal of 81802296 is 69220818.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 81802296.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28531 + ... + 31266.

Almost surely, 2^81802296 is an apocalyptic number.

It is an amenable number.

81802296 is an abundant number, since it is smaller than the sum of its proper divisors (151409904).

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

81802296 is a wasteful number, since it uses less digits than its factorization.

81802296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59828 (or 59821 counting only the distinct ones).

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

The square root of 81802296 is about 9044.4621730648. The cubic root of 81802296 is about 434.0987125658.

The spelling of 81802296 in words is "eighty-one million, eight hundred two thousand, two hundred ninety-six".