72396645 has 16 divisors (see below), whose sum is σ = 115940160. Its totient is φ = 38576384.

The previous prime is 72396637. The next prime is 72396647. The reversal of 72396645 is 54669327.

It is a cyclic number.

It is not a de Polignac number, because 72396645 - 2³ = 72396637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72396597 and 72396606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72396647) 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 15 ways as a sum of consecutive naturals, for example, 30802 + ... + 33068.

It is an arithmetic number, because the mean of its divisors is an integer number (7246260).

Almost surely, 2^72396645 is an apocalyptic number.

It is an amenable number.

72396645 is a deficient number, since it is larger than the sum of its proper divisors (43543515).

72396645 is a wasteful number, since it uses less digits than its factorization.

72396645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4404.

The product of its digits is 272160, while the sum is 42.

The square root of 72396645 is about 8508.6218037941. The cubic root of 72396645 is about 416.7793057249.

The spelling of 72396645 in words is "seventy-two million, three hundred ninety-six thousand, six hundred forty-five".