80449990 has 48 divisors (see below), whose sum is σ = 156740400. Its totient is φ = 29647296.

The previous prime is 80449969. The next prime is 80449997. The reversal of 80449990 is 9994408.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80449997) 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 23 ways as a sum of consecutive naturals, for example, 351196 + ... + 351424.

It is an arithmetic number, because the mean of its divisors is an integer number (3265425).

Almost surely, 2^80449990 is an apocalyptic number.

80449990 is a deficient number, since it is larger than the sum of its proper divisors (76290410).

80449990 is a wasteful number, since it uses less digits than its factorization.

80449990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341 (or 298 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 80449990 is about 8969.3918411451. The cubic root of 80449990 is about 431.6933230078.

The spelling of 80449990 in words is "eighty million, four hundred forty-nine thousand, nine hundred ninety".