72106238 has 8 divisors (see below), whose sum is σ = 111889080. Its totient is φ = 34809880.

The previous prime is 72106171. The next prime is 72106241. The reversal of 72106238 is 83260127.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a self number, because there is not a number n which added to its sum of digits gives 72106238.

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, 621548 + ... + 621663.

It is an arithmetic number, because the mean of its divisors is an integer number (13986135).

Almost surely, 2^72106238 is an apocalyptic number.

72106238 is a deficient number, since it is larger than the sum of its proper divisors (39782842).

72106238 is a wasteful number, since it uses less digits than its factorization.

72106238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243242.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 72106238 is about 8491.5392008752. The cubic root of 72106238 is about 416.2212788186.

The spelling of 72106238 in words is "seventy-two million, one hundred six thousand, two hundred thirty-eight".