73986440 has 32 divisors (see below), whose sum is σ = 181604160. Its totient is φ = 26904000.

The previous prime is 73986403. The next prime is 73986443. The reversal of 73986440 is 4468937.

It is not an unprimeable number, because it can be changed into a prime (73986443) 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 7 ways as a sum of consecutive naturals, for example, 83636 + ... + 84515.

It is an arithmetic number, because the mean of its divisors is an integer number (5675130).

Almost surely, 2^73986440 is an apocalyptic number.

It is an amenable number.

73986440 is an abundant number, since it is smaller than the sum of its proper divisors (107617720).

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

73986440 is a wasteful number, since it uses less digits than its factorization.

73986440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168173 (or 168169 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 73986440 is about 8601.5370719424. The cubic root of 73986440 is about 419.8079999214.

The spelling of 73986440 in words is "seventy-three million, nine hundred eighty-six thousand, four hundred forty".