81528826 has 16 divisors (see below), whose sum is σ = 124345728. Its totient is φ = 40086000.

The previous prime is 81528823. The next prime is 81528857. The reversal of 81528826 is 62882518.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (81528823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29796 + ... + 32416.

It is an arithmetic number, because the mean of its divisors is an integer number (7771608).

Almost surely, 2^81528826 is an apocalyptic number.

81528826 is a deficient number, since it is larger than the sum of its proper divisors (42816902).

81528826 is a wasteful number, since it uses less digits than its factorization.

81528826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2877.

The product of its digits is 61440, while the sum is 40.

The square root of 81528826 is about 9029.3314259695. The cubic root of 81528826 is about 433.6144331295.

The spelling of 81528826 in words is "eighty-one million, five hundred twenty-eight thousand, eight hundred twenty-six".