72655403 has 8 divisors (see below), whose sum is σ = 75541200. Its totient is φ = 69822720.

The previous prime is 72655397. The next prime is 72655441. The reversal of 72655403 is 30455627.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72655403 - 2⁶ = 72655339 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72655403.

It is not an unprimeable number, because it can be changed into a prime (72655903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10478 + ... + 15971.

It is an arithmetic number, because the mean of its divisors is an integer number (9442650).

Almost surely, 2^72655403 is an apocalyptic number.

72655403 is a deficient number, since it is larger than the sum of its proper divisors (2885797).

72655403 is a wasteful number, since it uses less digits than its factorization.

72655403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26557.

The product of its (nonzero) digits is 25200, while the sum is 32.

The square root of 72655403 is about 8523.8138764288. The cubic root of 72655403 is about 417.2752621726.

The spelling of 72655403 in words is "seventy-two million, six hundred fifty-five thousand, four hundred three".