81434848 has 24 divisors (see below), whose sum is σ = 174900600. Its totient is φ = 37015680.

The previous prime is 81434839. The next prime is 81434849. The reversal of 81434848 is 84843418.

It is a self number, because there is not a number n which added to its sum of digits gives 81434848.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81434849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115323 + ... + 116026.

It is an arithmetic number, because the mean of its divisors is an integer number (7287525).

Almost surely, 2^81434848 is an apocalyptic number.

81434848 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

81434848 is an abundant number, since it is smaller than the sum of its proper divisors (93465752).

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

81434848 is a wasteful number, since it uses less digits than its factorization.

81434848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231370 (or 231362 counting only the distinct ones).

The product of its digits is 98304, while the sum is 40.

The square root of 81434848 is about 9024.1258856468. The cubic root of 81434848 is about 433.4477604455.

The spelling of 81434848 in words is "eighty-one million, four hundred thirty-four thousand, eight hundred forty-eight".