72630645 has 16 divisors (see below), whose sum is σ = 120216960. Its totient is φ = 37400384.

The previous prime is 72630643. The next prime is 72630653. The reversal of 72630645 is 54603627.

It is a cyclic number.

It is not a de Polignac number, because 72630645 - 2¹ = 72630643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72630641) 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 15 ways as a sum of consecutive naturals, for example, 83049 + ... + 83918.

It is an arithmetic number, because the mean of its divisors is an integer number (7513560).

Almost surely, 2^72630645 is an apocalyptic number.

It is an amenable number.

72630645 is a deficient number, since it is larger than the sum of its proper divisors (47586315).

72630645 is a wasteful number, since it uses less digits than its factorization.

72630645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167004.

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 72630645 is about 8522.3614685133. The cubic root of 72630645 is about 417.2278599874.

The spelling of 72630645 in words is "seventy-two million, six hundred thirty thousand, six hundred forty-five".