72040686 has 8 divisors (see below), whose sum is σ = 144081384. Its totient is φ = 24013560.

The previous prime is 72040681. The next prime is 72040687. The reversal of 72040686 is 68604027.

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

72040686 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72040681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6003385 + ... + 6003396.

It is an arithmetic number, because the mean of its divisors is an integer number (18010173).

Almost surely, 2^72040686 is an apocalyptic number.

72040686 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72040686 is a wasteful number, since it uses less digits than its factorization.

72040686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12006786.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 72040686 is about 8487.6784811867. The cubic root of 72040686 is about 416.0951112348.

The spelling of 72040686 in words is "seventy-two million, forty thousand, six hundred eighty-six".