80491040 has 48 divisors (see below), whose sum is σ = 217328832. Its totient is φ = 27596544.

The previous prime is 80491009. The next prime is 80491043. The reversal of 80491040 is 4019408.

It is not an unprimeable number, because it can be changed into a prime (80491043) 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, 34814 + ... + 37053.

It is an arithmetic number, because the mean of its divisors is an integer number (4527684).

Almost surely, 2^80491040 is an apocalyptic number.

80491040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

80491040 is an abundant number, since it is smaller than the sum of its proper divisors (136837792).

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

80491040 is a wasteful number, since it uses less digits than its factorization.

80491040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71889 (or 71881 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 80491040 is about 8971.6798872898. The cubic root of 80491040 is about 431.7667350645.

The spelling of 80491040 in words is "eighty million, four hundred ninety-one thousand, forty".