81226976 has 24 divisors (see below), whose sum is σ = 168333480. Its totient is φ = 38475648.

The previous prime is 81226967. The next prime is 81226979. The reversal of 81226976 is 67962218.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81226979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66191 + ... + 67406.

It is an arithmetic number, because the mean of its divisors is an integer number (7013895).

Almost surely, 2^81226976 is an apocalyptic number.

It is an amenable number.

81226976 is an abundant number, since it is smaller than the sum of its proper divisors (87106504).

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

81226976 is a wasteful number, since it uses less digits than its factorization.

81226976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133626 (or 133618 counting only the distinct ones).

The product of its digits is 72576, while the sum is 41.

The square root of 81226976 is about 9012.6009564387. The cubic root of 81226976 is about 433.0786374431.

The spelling of 81226976 in words is "eighty-one million, two hundred twenty-six thousand, nine hundred seventy-six".