73985540 has 12 divisors (see below), whose sum is σ = 155369676. Its totient is φ = 29594208.

The previous prime is 73985531. The next prime is 73985543. The reversal of 73985540 is 4558937.

It can be written as a sum of positive squares in 2 ways, for example, as 43138624 + 30846916 = 6568^2 + 5554^2 .

It is not an unprimeable number, because it can be changed into a prime (73985543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1849619 + ... + 1849658.

It is an arithmetic number, because the mean of its divisors is an integer number (12947473).

Almost surely, 2^73985540 is an apocalyptic number.

It is an amenable number.

73985540 is an abundant number, since it is smaller than the sum of its proper divisors (81384136).

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

73985540 is a wasteful number, since it uses less digits than its factorization.

73985540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3699286 (or 3699284 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 41.

The square root of 73985540 is about 8601.4847555524. The cubic root of 73985540 is about 419.8062976782.

The spelling of 73985540 in words is "seventy-three million, nine hundred eighty-five thousand, five hundred forty".