72104128 has 14 divisors (see below), whose sum is σ = 143081756. Its totient is φ = 36052032.

The previous prime is 72104119. The next prime is 72104129. The reversal of 72104128 is 82140127.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (72104129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 563250 + ... + 563377.

Almost surely, 2^72104128 is an apocalyptic number.

It is an amenable number.

72104128 is a deficient number, since it is larger than the sum of its proper divisors (70977628).

72104128 is a wasteful number, since it uses less digits than its factorization.

72104128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1126639 (or 1126629 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 72104128 is about 8491.4149586509. The cubic root of 72104128 is about 416.2172189042.

The spelling of 72104128 in words is "seventy-two million, one hundred four thousand, one hundred twenty-eight".