81822384 has 60 divisors (see below), whose sum is σ = 261704976. Its totient is φ = 23377536.

The previous prime is 81822383. The next prime is 81822413. The reversal of 81822384 is 48322818.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (81822383) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39579 + ... + 41594.

Almost surely, 2^81822384 is an apocalyptic number.

81822384 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

81822384 is an abundant number, since it is smaller than the sum of its proper divisors (179882592).

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

81822384 is a wasteful number, since it uses less digits than its factorization.

81822384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81194 (or 81185 counting only the distinct ones).

The product of its digits is 24576, while the sum is 36.

The square root of 81822384 is about 9045.5726186903. The cubic root of 81822384 is about 434.1342431954.

The spelling of 81822384 in words is "eighty-one million, eight hundred twenty-two thousand, three hundred eighty-four".