80819944 has 8 divisors (see below), whose sum is σ = 151537410. Its totient is φ = 40409968.

The previous prime is 80819933. The next prime is 80819957. The reversal of 80819944 is 44991808.

It can be written as a sum of positive squares in only one way, i.e., 41757444 + 39062500 = 6462^2 + 6250^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 80819944.

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 as a sum of consecutive naturals, namely, 5051239 + ... + 5051254.

Almost surely, 2^80819944 is an apocalyptic number.

It is an amenable number.

80819944 is a deficient number, since it is larger than the sum of its proper divisors (70717466).

80819944 is a wasteful number, since it uses less digits than its factorization.

80819944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10102499 (or 10102495 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 80819944 is about 8989.9913236888. The cubic root of 80819944 is about 432.3540336277.

The spelling of 80819944 in words is "eighty million, eight hundred nineteen thousand, nine hundred forty-four".