72088581 has 8 divisors (see below), whose sum is σ = 96674400. Its totient is φ = 47780912.

The previous prime is 72088579. The next prime is 72088589. The reversal of 72088581 is 18588027.

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 72088581 - 2¹ = 72088579 is a prime.

It is a super-2 number, since 2×72088581² = 10393527021187122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72088589) 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, 68931 + ... + 69968.

It is an arithmetic number, because the mean of its divisors is an integer number (12084300).

Almost surely, 2^72088581 is an apocalyptic number.

It is an amenable number.

72088581 is a deficient number, since it is larger than the sum of its proper divisors (24585819).

72088581 is a wasteful number, since it uses less digits than its factorization.

72088581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139075.

The product of its (nonzero) digits is 35840, while the sum is 39.

The square root of 72088581 is about 8490.4994552735. The cubic root of 72088581 is about 416.1873020121.

The spelling of 72088581 in words is "seventy-two million, eighty-eight thousand, five hundred eighty-one".