72723015 has 20 divisors (see below), whose sum is σ = 130363464. Its totient is φ = 38785392.

The previous prime is 72723011. The next prime is 72723029. The reversal of 72723015 is 51032727.

It is not a de Polignac number, because 72723015 - 2² = 72723011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 72723015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72723011) 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 19 ways as a sum of consecutive naturals, for example, 89377 + ... + 90186.

Almost surely, 2^72723015 is an apocalyptic number.

72723015 is a deficient number, since it is larger than the sum of its proper divisors (57640449).

72723015 is a wasteful number, since it uses less digits than its factorization.

72723015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179580 (or 179571 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 72723015 is about 8527.7790191820. The cubic root of 72723015 is about 417.4046586887.

The spelling of 72723015 in words is "seventy-two million, seven hundred twenty-three thousand, fifteen".