81488827 has 16 divisors (see below), whose sum is σ = 96312832. Its totient is φ = 67495680.

The previous prime is 81488807. The next prime is 81488843. The reversal of 81488827 is 72888418.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-81488827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81488807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27802 + ... + 30592.

It is an arithmetic number, because the mean of its divisors is an integer number (6019552).

Almost surely, 2^81488827 is an apocalyptic number.

81488827 is a deficient number, since it is larger than the sum of its proper divisors (14824005).

81488827 is a wasteful number, since it uses less digits than its factorization.

81488827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2938.

The product of its digits is 229376, while the sum is 46.

The square root of 81488827 is about 9027.1162061868. The cubic root of 81488827 is about 433.5435094176.

The spelling of 81488827 in words is "eighty-one million, four hundred eighty-eight thousand, eight hundred twenty-seven".