72134578 has 8 divisors (see below), whose sum is σ = 112906368. Its totient is φ = 34499124.

The previous prime is 72134563. The next prime is 72134581. The reversal of 72134578 is 87543127.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 784026 + ... + 784117.

It is an arithmetic number, because the mean of its divisors is an integer number (14113296).

Almost surely, 2^72134578 is an apocalyptic number.

72134578 is a deficient number, since it is larger than the sum of its proper divisors (40771790).

72134578 is a wasteful number, since it uses less digits than its factorization.

72134578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1568168.

The product of its digits is 47040, while the sum is 37.

The square root of 72134578 is about 8493.2077567901. The cubic root of 72134578 is about 416.2758009901.

The spelling of 72134578 in words is "seventy-two million, one hundred thirty-four thousand, five hundred seventy-eight".