81448796 has 96 divisors (see below), whose sum is σ = 180182016. Its totient is φ = 31680000.

The previous prime is 81448793. The next prime is 81448799. The reversal of 81448796 is 69784418.

It is an interprime number because it is at equal distance from previous prime (81448793) and next prime (81448799).

It is a self number, because there is not a number n which added to its sum of digits gives 81448796.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81448793) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 539321 + ... + 539471.

It is an arithmetic number, because the mean of its divisors is an integer number (1876896).

Almost surely, 2^81448796 is an apocalyptic number.

It is an amenable number.

81448796 is an abundant number, since it is smaller than the sum of its proper divisors (98733220).

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

81448796 is a wasteful number, since it uses less digits than its factorization.

81448796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243 (or 241 counting only the distinct ones).

The product of its digits is 387072, while the sum is 47.

The square root of 81448796 is about 9024.8986697913. The cubic root of 81448796 is about 433.4725057250.

The spelling of 81448796 in words is "eighty-one million, four hundred forty-eight thousand, seven hundred ninety-six".