72840727 has 4 divisors (see below), whose sum is σ = 72866920. Its totient is φ = 72814536.

The previous prime is 72840707. The next prime is 72840769. The reversal of 72840727 is 72704827.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72840727 - 2¹¹ = 72838679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72840707) 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, 8352 + ... + 14677.

It is an arithmetic number, because the mean of its divisors is an integer number (18216730).

Almost surely, 2^72840727 is an apocalyptic number.

72840727 is a deficient number, since it is larger than the sum of its proper divisors (26193).

72840727 is a wasteful number, since it uses less digits than its factorization.

72840727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26192.

The product of its (nonzero) digits is 43904, while the sum is 37.

The square root of 72840727 is about 8534.6779083923. The cubic root of 72840727 is about 417.6297458510.

The spelling of 72840727 in words is "seventy-two million, eight hundred forty thousand, seven hundred twenty-seven".