81842060 has 24 divisors (see below), whose sum is σ = 177796080. Its totient is φ = 31607744.

The previous prime is 81842023. The next prime is 81842083. The reversal of 81842060 is 6024818.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69974 + ... + 71133.

It is an arithmetic number, because the mean of its divisors is an integer number (7408170).

Almost surely, 2^81842060 is an apocalyptic number.

It is an amenable number.

81842060 is an abundant number, since it is smaller than the sum of its proper divisors (95954020).

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

81842060 is a wasteful number, since it uses less digits than its factorization.

81842060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141145 (or 141143 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 81842060 is about 9046.6601572072. The cubic root of 81842060 is about 434.1690394632.

Adding to 81842060 its reverse (6024818), we get a palindrome (87866878).

The spelling of 81842060 in words is "eighty-one million, eight hundred forty-two thousand, sixty".