80640830 has 16 divisors (see below), whose sum is σ = 146992320. Its totient is φ = 31847712.

The previous prime is 80640823. The next prime is 80640839. The reversal of 80640830 is 3804608.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 80640793 and 80640802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80640839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50249 + ... + 51828.

It is an arithmetic number, because the mean of its divisors is an integer number (9187020).

Almost surely, 2^80640830 is an apocalyptic number.

80640830 is a deficient number, since it is larger than the sum of its proper divisors (66351490).

80640830 is a wasteful number, since it uses less digits than its factorization.

80640830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102163.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 80640830 is about 8980.0239420616. The cubic root of 80640830 is about 432.0344015528.

The spelling of 80640830 in words is "eighty million, six hundred forty thousand, eight hundred thirty".