72100472 has 8 divisors (see below), whose sum is σ = 135188400. Its totient is φ = 36050232.

The previous prime is 72100411. The next prime is 72100481. The reversal of 72100472 is 27400127.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

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 as a sum of consecutive naturals, namely, 4506272 + ... + 4506287.

It is an arithmetic number, because the mean of its divisors is an integer number (16898550).

Almost surely, 2^72100472 is an apocalyptic number.

It is an amenable number.

72100472 is a deficient number, since it is larger than the sum of its proper divisors (63087928).

72100472 is a wasteful number, since it uses less digits than its factorization.

72100472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9012565 (or 9012561 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 72100472 is about 8491.1996796684. The cubic root of 72100472 is about 416.2101840972.

Adding to 72100472 its reverse (27400127), we get a palindrome (99500599).

The spelling of 72100472 in words is "seventy-two million, one hundred thousand, four hundred seventy-two".