72644473 has 8 divisors (see below), whose sum is σ = 80548416. Its totient is φ = 64957200.

The previous prime is 72644471. The next prime is 72644477. The reversal of 72644473 is 37444627.

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

It is not a de Polignac number, because 72644473 - 2¹ = 72644471 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72644471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53461 + ... + 54802.

It is an arithmetic number, because the mean of its divisors is an integer number (10068552).

Almost surely, 2^72644473 is an apocalyptic number.

It is an amenable number.

72644473 is a deficient number, since it is larger than the sum of its proper divisors (7903943).

72644473 is a wasteful number, since it uses less digits than its factorization.

72644473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108335.

The product of its digits is 112896, while the sum is 37.

The square root of 72644473 is about 8523.1727073901. The cubic root of 72644473 is about 417.2543366936.

The spelling of 72644473 in words is "seventy-two million, six hundred forty-four thousand, four hundred seventy-three".