80622440 has 48 divisors (see below), whose sum is σ = 184558500. Its totient is φ = 31696896.

The previous prime is 80622439. The next prime is 80622457. The reversal of 80622440 is 4422608.

It is a Cunningham number, because it is equal to 8979²-1.

It can be written as a sum of positive squares in 2 ways, for example, as 80604484 + 17956 = 8978^2 + 134^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 179336 + ... + 179784.

Almost surely, 2^80622440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80622440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92279250).

80622440 is an abundant number, since it is smaller than the sum of its proper divisors (103936060).

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

80622440 is a wasteful number, since it uses less digits than its factorization.

80622440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594 (or 523 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 80622440 is about 8978.9999443145. Note that the first 4 decimals coincide. The cubic root of 80622440 is about 432.0015574932.

The spelling of 80622440 in words is "eighty million, six hundred twenty-two thousand, four hundred forty".