72129366 has 40 divisors (see below), whose sum is σ = 162118704. Its totient is φ = 23969520.

The previous prime is 72129353. The next prime is 72129401. The reversal of 72129366 is 66392127.

It is a self number, because there is not a number n which added to its sum of digits gives 72129366.

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 87231 + ... + 88053.

Almost surely, 2^72129366 is an apocalyptic number.

72129366 is an abundant number, since it is smaller than the sum of its proper divisors (89989338).

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

72129366 is a wasteful number, since it uses less digits than its factorization.

72129366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378 (or 1369 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 72129366 is about 8492.9009178254. The cubic root of 72129366 is about 416.2657749074.

The spelling of 72129366 in words is "seventy-two million, one hundred twenty-nine thousand, three hundred sixty-six".