80910000 has 300 divisors, whose sum is σ = 302153280. Its totient is φ = 20160000.

The previous prime is 80909981. The next prime is 80910007. The reversal of 80910000 is 1908.

It is a tau number, because it is divible by the number of its divisors (300).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (80910007) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 2609985 + ... + 2610015.

Almost surely, 2^80910000 is an apocalyptic number.

80910000 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 80910000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151076640).

80910000 is an abundant number, since it is smaller than the sum of its proper divisors (221243280).

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

80910000 is a wasteful number, since it uses less digits than its factorization.

80910000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94 (or 70 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 80910000 is about 8994.9986103390. The cubic root of 80910000 is about 432.5145617515.

Adding to 80910000 its reverse (1908), we get a palindrome (80911908).

The spelling of 80910000 in words is "eighty million, nine hundred ten thousand".