81206048 has 48 divisors (see below), whose sum is σ = 199329984. Its totient is φ = 31637760.

The previous prime is 81206039. The next prime is 81206051. The reversal of 81206048 is 84060218.

It is a self number, because there is not a number n which added to its sum of digits gives 81206048.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14015 + ... + 18942.

It is an arithmetic number, because the mean of its divisors is an integer number (4152708).

Almost surely, 2^81206048 is an apocalyptic number.

81206048 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

81206048 is an abundant number, since it is smaller than the sum of its proper divisors (118123936).

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

81206048 is a wasteful number, since it uses less digits than its factorization.

81206048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32985 (or 32977 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 81206048 is about 9011.4398405582. The cubic root of 81206048 is about 433.0414402430.

The spelling of 81206048 in words is "eighty-one million, two hundred six thousand, forty-eight".