72688069 has 8 divisors (see below), whose sum is σ = 74649600. Its totient is φ = 70748496.

The previous prime is 72688061. The next prime is 72688079. The reversal of 72688069 is 96088627.

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 72688069 - 2³ = 72688061 is a prime.

It is a super-2 number, since 2×72688069² = 10567110749897522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72688061) by changing a digit.

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, 1332 + ... + 12130.

It is an arithmetic number, because the mean of its divisors is an integer number (9331200).

Almost surely, 2^72688069 is an apocalyptic number.

It is an amenable number.

72688069 is a deficient number, since it is larger than the sum of its proper divisors (1961531).

72688069 is a wasteful number, since it uses less digits than its factorization.

72688069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10979.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 72688069 is about 8525.7298221325. The cubic root of 72688069 is about 417.3377887059.

The spelling of 72688069 in words is "seventy-two million, six hundred eighty-eight thousand, sixty-nine".