81753882 has 32 divisors (see below), whose sum is σ = 192897024. Its totient is φ = 22604400.

The previous prime is 81753863. The next prime is 81753911. The reversal of 81753882 is 28835718.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30094 + ... + 32697.

It is an arithmetic number, because the mean of its divisors is an integer number (6028032).

Almost surely, 2^81753882 is an apocalyptic number.

81753882 is an abundant number, since it is smaller than the sum of its proper divisors (111143142).

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

81753882 is a wasteful number, since it uses less digits than its factorization.

81753882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62834.

The product of its digits is 107520, while the sum is 42.

The square root of 81753882 is about 9041.7853325546. The cubic root of 81753882 is about 434.0130564428.

The spelling of 81753882 in words is "eighty-one million, seven hundred fifty-three thousand, eight hundred eighty-two".