81827416 has 32 divisors (see below), whose sum is σ = 167832000. Its totient is φ = 37092640.

The previous prime is 81827393. The next prime is 81827441. The reversal of 81827416 is 61472818.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37935 + ... + 40033.

It is an arithmetic number, because the mean of its divisors is an integer number (5244750).

Almost surely, 2^81827416 is an apocalyptic number.

It is an amenable number.

81827416 is an abundant number, since it is smaller than the sum of its proper divisors (86004584).

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

81827416 is a wasteful number, since it uses less digits than its factorization.

81827416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2559 (or 2555 counting only the distinct ones).

The product of its digits is 21504, while the sum is 37.

The square root of 81827416 is about 9045.8507615370. The cubic root of 81827416 is about 434.1431426294.

The spelling of 81827416 in words is "eighty-one million, eight hundred twenty-seven thousand, four hundred sixteen".