80640822 has 16 divisors (see below), whose sum is σ = 166843440. Its totient is φ = 25953312.

The previous prime is 80640821. The next prime is 80640823. The reversal of 80640822 is 22804608.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (80640821) and next prime (80640823).

It is a self number, because there is not a number n which added to its sum of digits gives 80640822.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 231553 + ... + 231900.

It is an arithmetic number, because the mean of its divisors is an integer number (10427715).

Almost surely, 2^80640822 is an apocalyptic number.

80640822 is an abundant number, since it is smaller than the sum of its proper divisors (86202618).

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

80640822 is a wasteful number, since it uses less digits than its factorization.

80640822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463487.

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 80640822 is about 8980.0234966285. The cubic root of 80640822 is about 432.0343872661.

The spelling of 80640822 in words is "eighty million, six hundred forty thousand, eight hundred twenty-two".