72757122 has 8 divisors (see below), whose sum is σ = 145514256. Its totient is φ = 24252372.

The previous prime is 72757117. The next prime is 72757141. The reversal of 72757122 is 22175727.

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

72757122 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 6063088 + ... + 6063099.

It is an arithmetic number, because the mean of its divisors is an integer number (18189282).

Almost surely, 2^72757122 is an apocalyptic number.

72757122 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72757122 is a wasteful number, since it uses less digits than its factorization.

72757122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12126192.

The product of its digits is 13720, while the sum is 33.

The square root of 72757122 is about 8529.7785434324. The cubic root of 72757122 is about 417.4699025718.

The spelling of 72757122 in words is "seventy-two million, seven hundred fifty-seven thousand, one hundred twenty-two".