72080405 has 8 divisors (see below), whose sum is σ = 86627232. Its totient is φ = 57577168.

The previous prime is 72080401. The next prime is 72080429. The reversal of 72080405 is 50408027.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72080405 - 2² = 72080401 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72080401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7139 + ... + 13968.

It is an arithmetic number, because the mean of its divisors is an integer number (10828404).

Almost surely, 2^72080405 is an apocalyptic number.

It is an amenable number.

72080405 is a deficient number, since it is larger than the sum of its proper divisors (14546827).

72080405 is a wasteful number, since it uses less digits than its factorization.

72080405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21795.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 72080405 is about 8490.0179622896. The cubic root of 72080405 is about 416.1715673147.

The spelling of 72080405 in words is "seventy-two million, eighty thousand, four hundred five".