81482856 has 64 divisors (see below), whose sum is σ = 250723200. Its totient is φ = 21489408.

The previous prime is 81482851. The next prime is 81482857. The reversal of 81482856 is 65828418.

It is a super-4 number, since 4×81482856⁴ (a number of 33 digits) contains 4444 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (81482851) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 16471 + ... + 20838.

It is an arithmetic number, because the mean of its divisors is an integer number (3917550).

Almost surely, 2^81482856 is an apocalyptic number.

It is an amenable number.

81482856 is an abundant number, since it is smaller than the sum of its proper divisors (169240344).

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

81482856 is a wasteful number, since it uses less digits than its factorization.

81482856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37338 (or 37334 counting only the distinct ones).

The product of its digits is 122880, while the sum is 42.

The square root of 81482856 is about 9026.7854743535. The cubic root of 81482856 is about 433.5329200251.

The spelling of 81482856 in words is "eighty-one million, four hundred eighty-two thousand, eight hundred fifty-six".