72432905 has 8 divisors (see below), whose sum is σ = 87009984. Its totient is φ = 57886000.

The previous prime is 72432889. The next prime is 72432953. The reversal of 72432905 is 50923427.

It is a happy number.

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

It is not a de Polignac number, because 72432905 - 2⁴ = 72432889 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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, 1871 + ... + 12180.

It is an arithmetic number, because the mean of its divisors is an integer number (10876248).

Almost surely, 2^72432905 is an apocalyptic number.

It is an amenable number.

72432905 is a deficient number, since it is larger than the sum of its proper divisors (14577079).

72432905 is a wasteful number, since it uses less digits than its factorization.

72432905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15087.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 72432905 is about 8510.7523169224. The cubic root of 72432905 is about 416.8488756859.

It can be divided in two parts, 72432 and 905, that added together give a palindrome (73337).

The spelling of 72432905 in words is "seventy-two million, four hundred thirty-two thousand, nine hundred five".