80987100 has 72 divisors (see below), whose sum is σ = 236495280. Its totient is φ = 21396480.

The previous prime is 80987083. The next prime is 80987107. The reversal of 80987100 is 178908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80987107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32706 + ... + 35094.

Almost surely, 2^80987100 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 80987100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118247640).

80987100 is an abundant number, since it is smaller than the sum of its proper divisors (155508180).

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

80987100 is a wasteful number, since it uses less digits than its factorization.

80987100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2519 (or 2512 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 33.

The square root of 80987100 is about 8999.2833047971. The cubic root of 80987100 is about 432.6519007129.

The spelling of 80987100 in words is "eighty million, nine hundred eighty-seven thousand, one hundred".