80820144 has 30 divisors (see below), whose sum is σ = 226184556. Its totient is φ = 26940000.

The previous prime is 80820139. The next prime is 80820149. The reversal of 80820144 is 44102808.

It is an interprime number because it is at equal distance from previous prime (80820139) and next prime (80820149).

It is not an unprimeable number, because it can be changed into a prime (80820149) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 280482 + ... + 280769.

Almost surely, 2^80820144 is an apocalyptic number.

It is an amenable number.

80820144 is an abundant number, since it is smaller than the sum of its proper divisors (145364412).

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

80820144 is a wasteful number, since it uses less digits than its factorization.

80820144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561265 (or 561256 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 80820144 is about 8990.0024471632. The cubic root of 80820144 is about 432.3543902672.

The spelling of 80820144 in words is "eighty million, eight hundred twenty thousand, one hundred forty-four".