81063888 has 80 divisors (see below), whose sum is σ = 227235456. Its totient is φ = 24801280.

The previous prime is 81063887. The next prime is 81063889. The reversal of 81063888 is 88836018.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (81063887) and next prime (81063889).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81063881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32245 + ... + 34667.

Almost surely, 2^81063888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81063888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113617728).

81063888 is an abundant number, since it is smaller than the sum of its proper divisors (146171568).

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

81063888 is a wasteful number, since it uses less digits than its factorization.

81063888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2492 (or 2486 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 42.

The square root of 81063888 is about 9003.5486337333. The cubic root of 81063888 is about 432.7885972967.

The spelling of 81063888 in words is "eighty-one million, sixty-three thousand, eight hundred eighty-eight".