72100732 has 12 divisors (see below), whose sum is σ = 137646936. Its totient is φ = 32773040.

The previous prime is 72100727. The next prime is 72100733. The reversal of 72100732 is 23700127.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72100733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 819283 + ... + 819370.

It is an arithmetic number, because the mean of its divisors is an integer number (11470578).

Almost surely, 2^72100732 is an apocalyptic number.

It is an amenable number.

72100732 is a deficient number, since it is larger than the sum of its proper divisors (65546204).

72100732 is a wasteful number, since it uses less digits than its factorization.

72100732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1638668 (or 1638666 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 22.

The square root of 72100732 is about 8491.2149896231. The cubic root of 72100732 is about 416.2106843922.

Adding to 72100732 its reverse (23700127), we get a palindrome (95800859).

The spelling of 72100732 in words is "seventy-two million, one hundred thousand, seven hundred thirty-two".