72246578 has 8 divisors (see below), whose sum is σ = 108636060. Its totient is φ = 36034560.

The previous prime is 72246571. The next prime is 72246589. The reversal of 72246578 is 87564227.

It can be written as a sum of positive squares in 2 ways, for example, as 54715609 + 17530969 = 7397^2 + 4187^2 .

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

It is not an unprimeable number, because it can be changed into a prime (72246571) 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, 43343 + ... + 44978.

Almost surely, 2^72246578 is an apocalyptic number.

72246578 is a deficient number, since it is larger than the sum of its proper divisors (36389482).

72246578 is a wasteful number, since it uses less digits than its factorization.

72246578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88732.

The product of its digits is 188160, while the sum is 41.

The square root of 72246578 is about 8499.7987034988. The cubic root of 72246578 is about 416.4911335997.

The spelling of 72246578 in words is "seventy-two million, two hundred forty-six thousand, five hundred seventy-eight".