72128214 has 12 divisors (see below), whose sum is σ = 156277836. Its totient is φ = 24042732.

The previous prime is 72128213. The next prime is 72128219. The reversal of 72128214 is 41282127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72128213) 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 5 ways as a sum of consecutive naturals, for example, 2003544 + ... + 2003579.

It is an arithmetic number, because the mean of its divisors is an integer number (13023153).

Almost surely, 2^72128214 is an apocalyptic number.

72128214 is an abundant number, since it is smaller than the sum of its proper divisors (84149622).

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

72128214 is a wasteful number, since it uses less digits than its factorization.

72128214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4007131 (or 4007128 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 72128214 is about 8492.8330962053. The cubic root of 72128214 is about 416.2635587932.

The spelling of 72128214 in words is "seventy-two million, one hundred twenty-eight thousand, two hundred fourteen".