72544630 has 16 divisors (see below), whose sum is σ = 132794640. Its totient is φ = 28525792.

The previous prime is 72544607. The next prime is 72544639. The reversal of 72544630 is 3644527.

It is a junction number, because it is equal to n+sod(n) for n = 72544592 and 72544601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72544639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60889 + ... + 62068.

It is an arithmetic number, because the mean of its divisors is an integer number (8299665).

Almost surely, 2^72544630 is an apocalyptic number.

72544630 is a deficient number, since it is larger than the sum of its proper divisors (60250010).

72544630 is a wasteful number, since it uses less digits than its factorization.

72544630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123023.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 72544630 is about 8517.3135436005. The cubic root of 72544630 is about 417.0630900945.

The spelling of 72544630 in words is "seventy-two million, five hundred forty-four thousand, six hundred thirty".