81088000 has 160 divisors (see below), whose sum is σ = 232360128. Its totient is φ = 27648000.

The previous prime is 81087997. The next prime is 81088003. The reversal of 81088000 is 88018.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (81087997) and next prime (81088003).

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81088003) 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, 447910 + ... + 448090.

Almost surely, 2^81088000 is an apocalyptic number.

81088000 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81088000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116180064).

81088000 is an abundant number, since it is smaller than the sum of its proper divisors (151272128).

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

81088000 is an equidigital number, since it uses as much as digits as its factorization.

81088000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 81088000 is about 9004.8875617633. The cubic root of 81088000 is about 432.8315032254.

The spelling of 81088000 in words is "eighty-one million, eighty-eight thousand".