72322005 has 32 divisors (see below), whose sum is σ = 138000384. Its totient is φ = 31622976.

The previous prime is 72321983. The next prime is 72322007. The reversal of 72322005 is 50022327.

It is not a de Polignac number, because 72322005 - 2⁶ = 72321941 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72322007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12559 + ... + 17388.

It is an arithmetic number, because the mean of its divisors is an integer number (4312512).

Almost surely, 2^72322005 is an apocalyptic number.

It is an amenable number.

72322005 is a deficient number, since it is larger than the sum of its proper divisors (65678379).

72322005 is a wasteful number, since it uses less digits than its factorization.

72322005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29985.

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 72322005 is about 8504.2345334545. The cubic root of 72322005 is about 416.6360251245.

The spelling of 72322005 in words is "seventy-two million, three hundred twenty-two thousand, five".