80100000 has 216 divisors, whose sum is σ = 287911260. Its totient is φ = 21120000.

The previous prime is 80099989. The next prime is 80100011. The reversal of 80100000 is 108.

It is an interprime number because it is at equal distance from previous prime (80099989) and next prime (80100011).

It can be written as a sum of positive squares in 6 ways, for example, as 19820304 + 60279696 = 4452^2 + 7764^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a congruent number.

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 35 ways as a sum of consecutive naturals, for example, 899956 + ... + 900044.

Almost surely, 2^80100000 is an apocalyptic number.

80100000 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 80100000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143955630).

80100000 is an abundant number, since it is smaller than the sum of its proper divisors (207811260).

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

80100000 is an equidigital number, since it uses as much as digits as its factorization.

80100000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 80100000 is about 8949.8603341058. The cubic root of 80100000 is about 431.0663994757.

Adding to 80100000 its reverse (108), we get a palindrome (80100108).

The spelling of 80100000 in words is "eighty million, one hundred thousand".