72726549 has 16 divisors (see below), whose sum is σ = 111900672. Its totient is φ = 41153328.

The previous prime is 72726541. The next prime is 72726551. The reversal of 72726549 is 94562727.

It is not a de Polignac number, because 72726549 - 2³ = 72726541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72726549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72726541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14649 + ... + 18974.

It is an arithmetic number, because the mean of its divisors is an integer number (6993792).

Almost surely, 2^72726549 is an apocalyptic number.

It is an amenable number.

72726549 is a deficient number, since it is larger than the sum of its proper divisors (39174123).

72726549 is a wasteful number, since it uses less digits than its factorization.

72726549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33736.

The product of its digits is 211680, while the sum is 42.

The square root of 72726549 is about 8527.9862218463. The cubic root of 72726549 is about 417.4114198870.

The spelling of 72726549 in words is "seventy-two million, seven hundred twenty-six thousand, five hundred forty-nine".