72106236 has 36 divisors (see below), whose sum is σ = 183046864. Its totient is φ = 23932800.

The previous prime is 72106171. The next prime is 72106241. The reversal of 72106236 is 63260127.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 4521 + ... + 12831.

Almost surely, 2^72106236 is an apocalyptic number.

It is an amenable number.

72106236 is an abundant number, since it is smaller than the sum of its proper divisors (110940628).

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

72106236 is a wasteful number, since it uses less digits than its factorization.

72106236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8562 (or 8557 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 72106236 is about 8491.5390831109. The cubic root of 72106236 is about 416.2212749704.

The spelling of 72106236 in words is "seventy-two million, one hundred six thousand, two hundred thirty-six".