72109204 has 12 divisors (see below), whose sum is σ = 126268884. Its totient is φ = 36032384.

The previous prime is 72109187. The next prime is 72109217. The reversal of 72109204 is 40290127.

It can be written as a sum of positive squares in 2 ways, for example, as 6012304 + 66096900 = 2452^2 + 8130^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3324 + ... + 12460.

It is an arithmetic number, because the mean of its divisors is an integer number (10522407).

Almost surely, 2^72109204 is an apocalyptic number.

It is an amenable number.

72109204 is a deficient number, since it is larger than the sum of its proper divisors (54159680).

72109204 is a wasteful number, since it uses less digits than its factorization.

72109204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11114 (or 11112 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 72109204 is about 8491.7138435065. The cubic root of 72109204 is about 416.2269856544.

The spelling of 72109204 in words is "seventy-two million, one hundred nine thousand, two hundred four".