72224578 has 8 divisors (see below), whose sum is σ = 108564480. Its totient is φ = 36036420.

The previous prime is 72224569. The next prime is 72224609. The reversal of 72224578 is 87542227.

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 36738 + ... + 38653.

It is an arithmetic number, because the mean of its divisors is an integer number (13570560).

Almost surely, 2^72224578 is an apocalyptic number.

72224578 is a deficient number, since it is larger than the sum of its proper divisors (36339902).

72224578 is a wasteful number, since it uses less digits than its factorization.

72224578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75872.

The product of its digits is 62720, while the sum is 37.

The square root of 72224578 is about 8498.5044566677. The cubic root of 72224578 is about 416.4488536956.

The spelling of 72224578 in words is "seventy-two million, two hundred twenty-four thousand, five hundred seventy-eight".