72381020 has 24 divisors (see below), whose sum is σ = 153350064. Its totient is φ = 28695296.

The previous prime is 72381017. The next prime is 72381047. The reversal of 72381020 is 2018327.

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 in 7 ways as a sum of consecutive naturals, for example, 13754 + ... + 18273.

It is an arithmetic number, because the mean of its divisors is an integer number (6389586).

Almost surely, 2^72381020 is an apocalyptic number.

It is an amenable number.

72381020 is an abundant number, since it is smaller than the sum of its proper divisors (80969044).

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

72381020 is a wasteful number, since it uses less digits than its factorization.

72381020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32149 (or 32147 counting only the distinct ones).

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

The square root of 72381020 is about 8507.7035679436. The cubic root of 72381020 is about 416.7493197810.

Adding to 72381020 its reverse (2018327), we get a palindrome (74399347).

The spelling of 72381020 in words is "seventy-two million, three hundred eighty-one thousand, twenty".