80640826 has 48 divisors (see below), whose sum is σ = 154728000. Its totient is φ = 30786048.

The previous prime is 80640823. The next prime is 80640839. The reversal of 80640826 is 62804608.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 80640791 and 80640800.

It is not an unprimeable number, because it can be changed into a prime (80640821) 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, 76350 + ... + 77398.

It is an arithmetic number, because the mean of its divisors is an integer number (3223500).

Almost surely, 2^80640826 is an apocalyptic number.

80640826 is a deficient number, since it is larger than the sum of its proper divisors (74087174).

80640826 is a wasteful number, since it uses less digits than its factorization.

80640826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111 (or 1094 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 80640826 is about 8980.0237193451. The cubic root of 80640826 is about 432.0343944095.

The spelling of 80640826 in words is "eighty million, six hundred forty thousand, eight hundred twenty-six".