80000000 has 88 divisors (see below), whose sum is σ = 199901832.
Its totient is φ = 32000000.
The previous prime is 79999987. The next prime is 80000023. The reversal of 80000000 is 8.
It is a powerful number, because all its prime factors have an exponent greater than 1
and also an Achilles number because it is not a perfect power.
It can be written as a sum of positive squares in 4 ways, for example, as 79138816 + 861184 = 8896^2 + 928^2
It is a Harshad number since it is a multiple of its sum of digits (8).
It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.
It is a nialpdrome in base 10.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15999998 + ... + 16000002.
Almost surely, 280000000 is an apocalyptic number.
80000000 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 80000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99950916).
80000000 is an abundant number, since it is smaller than the sum of its proper divisors (119901832).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
80000000 is an frugal number, since it uses more digits than its factorization.
80000000 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 55 (or 7 counting only the distinct ones).
The product of its (nonzero) digits is 8, while the sum is 8.
The square root of 80000000 is about 8944.2719099992.
The cubic root of 80000000 is about 430.8869380064.
The spelling of 80000000 in words is "eighty million", and thus it is an aban number and an uban number.