81828276 has 24 divisors (see below), whose sum is σ = 202164480. Its totient is φ = 25671552.

The previous prime is 81828223. The next prime is 81828277. The reversal of 81828276 is 67282818.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81828277) 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, 200356 + ... + 200763.

It is an arithmetic number, because the mean of its divisors is an integer number (8423520).

Almost surely, 2^81828276 is an apocalyptic number.

It is an amenable number.

81828276 is an abundant number, since it is smaller than the sum of its proper divisors (120336204).

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

81828276 is a wasteful number, since it uses less digits than its factorization.

81828276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401143 (or 401141 counting only the distinct ones).

The product of its digits is 86016, while the sum is 42.

The square root of 81828276 is about 9045.8982970184. The cubic root of 81828276 is about 434.1446635614.

The spelling of 81828276 in words is "eighty-one million, eight hundred twenty-eight thousand, two hundred seventy-six".