72724034 has 8 divisors (see below), whose sum is σ = 109143180. Its totient is φ = 36342976.

The previous prime is 72724033. The next prime is 72724111. The reversal of 72724034 is 43042727.

It can be written as a sum of positive squares in 2 ways, for example, as 52519009 + 20205025 = 7247^2 + 4495^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 72723988 and 72724006.

It is not an unprimeable number, because it can be changed into a prime (72724033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4139 + ... + 12750.

Almost surely, 2^72724034 is an apocalyptic number.

72724034 is a deficient number, since it is larger than the sum of its proper divisors (36419146).

72724034 is a wasteful number, since it uses less digits than its factorization.

72724034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19044.

The product of its (nonzero) digits is 9408, while the sum is 29.

The square root of 72724034 is about 8527.8387648923. The cubic root of 72724034 is about 417.4066082474.

The spelling of 72724034 in words is "seventy-two million, seven hundred twenty-four thousand, thirty-four".