73440080 has 40 divisors (see below), whose sum is σ = 195142272. Its totient is φ = 25179264.

The previous prime is 73440077. The next prime is 73440089. The reversal of 73440080 is 8004437.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73440089) 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, 65012 + ... + 66131.

Almost surely, 2^73440080 is an apocalyptic number.

73440080 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

73440080 is an abundant number, since it is smaller than the sum of its proper divisors (121702192).

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

73440080 is a wasteful number, since it uses less digits than its factorization.

73440080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131163 (or 131157 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 73440080 is about 8569.7187818504. The cubic root of 73440080 is about 418.7720748740.

The spelling of 73440080 in words is "seventy-three million, four hundred forty thousand, eighty".