72538645 has 8 divisors (see below), whose sum is σ = 87101856. Its totient is φ = 57993936.

The previous prime is 72538639. The next prime is 72538663. The reversal of 72538645 is 54683527.

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 72538645 - 2⁷ = 72538517 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72538598 and 72538607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6394 + ... + 13636.

It is an arithmetic number, because the mean of its divisors is an integer number (10887732).

Almost surely, 2^72538645 is an apocalyptic number.

It is an amenable number.

72538645 is a deficient number, since it is larger than the sum of its proper divisors (14563211).

72538645 is a wasteful number, since it uses less digits than its factorization.

72538645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9251.

The product of its digits is 201600, while the sum is 40.

The square root of 72538645 is about 8516.9621931766. The cubic root of 72538645 is about 417.0516204137.

The spelling of 72538645 in words is "seventy-two million, five hundred thirty-eight thousand, six hundred forty-five".