81420096 has 56 divisors (see below), whose sum is σ = 220699584. Its totient is φ = 26475520.

The previous prime is 81420083. The next prime is 81420127. The reversal of 81420096 is 69002418.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2701 + ... + 13043.

It is an arithmetic number, because the mean of its divisors is an integer number (3941064).

Almost surely, 2^81420096 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81420096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110349792).

81420096 is an abundant number, since it is smaller than the sum of its proper divisors (139279488).

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

81420096 is a wasteful number, since it uses less digits than its factorization.

81420096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10399 (or 10389 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 81420096 is about 9023.3084841426. The cubic root of 81420096 is about 433.4215857071.

It can be divided in two parts, 814 and 20096, that added together give a triangular number (20910 = T₂₀₄).

The spelling of 81420096 in words is "eighty-one million, four hundred twenty thousand, ninety-six".