80670816 has 60 divisors (see below), whose sum is σ = 237258252. Its totient is φ = 26889408.
The previous prime is 80670803. The next prime is 80670817. The reversal of 80670816 is 61807608.
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (80670817) by changing a digit.
It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 12970 + ... + 18153.
Almost surely, 280670816 is an apocalyptic number.
It is an amenable number.
80670816 is an abundant number, since it is smaller than the sum of its proper divisors (156587436).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
80670816 is a wasteful number, since it uses less digits than its factorization.
80670816 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 31145 (or 31128 counting only the distinct ones).
The product of its (nonzero) digits is 16128, while the sum is 36.
The square root of 80670816 is about 8981.6933815400. The cubic root of 80670816 is about 432.0879450582.
The spelling of 80670816 in words is "eighty million, six hundred seventy thousand, eight hundred sixteen".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.060 sec. • engine limits •