73405688 has 8 divisors (see below), whose sum is σ = 137635680. Its totient is φ = 36702840.

The previous prime is 73405679. The next prime is 73405729. The reversal of 73405688 is 88650437.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×73405688³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4587848 + ... + 4587863.

It is an arithmetic number, because the mean of its divisors is an integer number (17204460).

Almost surely, 2^73405688 is an apocalyptic number.

It is an amenable number.

73405688 is a deficient number, since it is larger than the sum of its proper divisors (64229992).

73405688 is a wasteful number, since it uses less digits than its factorization.

73405688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9175717 (or 9175713 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 73405688 is about 8567.7119466051. The cubic root of 73405688 is about 418.7066943261.

The spelling of 73405688 in words is "seventy-three million, four hundred five thousand, six hundred eighty-eight".