81478048 has 24 divisors (see below), whose sum is σ = 160886628. Its totient is φ = 40617984.

The previous prime is 81478031. The next prime is 81478051. The reversal of 81478048 is 84087418.

It can be written as a sum of positive squares in 2 ways, for example, as 80066704 + 1411344 = 8948^2 + 1188^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 81478048.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7690 + ... + 14902.

Almost surely, 2^81478048 is an apocalyptic number.

It is an amenable number.

81478048 is a deficient number, since it is larger than the sum of its proper divisors (79408580).

81478048 is a wasteful number, since it uses less digits than its factorization.

81478048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7576 (or 7568 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 40.

The square root of 81478048 is about 9026.5191519212. The cubic root of 81478048 is about 433.5243928028.

The spelling of 81478048 in words is "eighty-one million, four hundred seventy-eight thousand, forty-eight".