81288048 has 20 divisors (see below), whose sum is σ = 209994248. Its totient is φ = 27096000.

The previous prime is 81288043. The next prime is 81288083. The reversal of 81288048 is 84088218.

It is a junction number, because it is equal to n+sod(n) for n = 81287997 and 81288015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81288043) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 846703 + ... + 846798.

Almost surely, 2^81288048 is an apocalyptic number.

It is an amenable number.

81288048 is an abundant number, since it is smaller than the sum of its proper divisors (128706200).

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

81288048 is a wasteful number, since it uses less digits than its factorization.

81288048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1693512 (or 1693506 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 39.

The square root of 81288048 is about 9015.9884649438. The cubic root of 81288048 is about 433.1871496390.

The spelling of 81288048 in words is "eighty-one million, two hundred eighty-eight thousand, forty-eight".