72100328 has 16 divisors (see below), whose sum is σ = 136386180. Its totient is φ = 35730688.

The previous prime is 72100319. The next prime is 72100367. The reversal of 72100328 is 82300127.

It can be written as a sum of positive squares in 2 ways, for example, as 67930564 + 4169764 = 8242^2 + 2042^2 .

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, 38975 + ... + 40782.

Almost surely, 2^72100328 is an apocalyptic number.

It is an amenable number.

72100328 is a deficient number, since it is larger than the sum of its proper divisors (64285852).

72100328 is a wasteful number, since it uses less digits than its factorization.

72100328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79876 (or 79872 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 72100328 is about 8491.1912002969. The cubic root of 72100328 is about 416.2099070102.

The spelling of 72100328 in words is "seventy-two million, one hundred thousand, three hundred twenty-eight".