72140372 has 6 divisors (see below), whose sum is σ = 126245658. Its totient is φ = 36070184.

The previous prime is 72140357. The next prime is 72140389. The reversal of 72140372 is 27304127.

It can be written as a sum of positive squares in only one way, i.e., 71132356 + 1008016 = 8434^2 + 1004^2 .

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, 9017543 + ... + 9017550.

It is an arithmetic number, because the mean of its divisors is an integer number (21040943).

Almost surely, 2^72140372 is an apocalyptic number.

It is an amenable number.

72140372 is a deficient number, since it is larger than the sum of its proper divisors (54105286).

72140372 is a wasteful number, since it uses less digits than its factorization.

72140372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18035097 (or 18035095 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 72140372 is about 8493.5488460360. The cubic root of 72140372 is about 416.2869460723.

Adding to 72140372 its reverse (27304127), we get a palindrome (99444499).

The spelling of 72140372 in words is "seventy-two million, one hundred forty thousand, three hundred seventy-two".