72122836 has 12 divisors (see below), whose sum is σ = 127179360. Its totient is φ = 35785880.

The previous prime is 72122819. The next prime is 72122849. The reversal of 72122836 is 63822127.

It is a junction number, because it is equal to n+sod(n) for n = 72122798 and 72122807.

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, 68296 + ... + 69343.

It is an arithmetic number, because the mean of its divisors is an integer number (10598280).

Almost surely, 2^72122836 is an apocalyptic number.

It is an amenable number.

72122836 is a deficient number, since it is larger than the sum of its proper divisors (55056524).

72122836 is a wasteful number, since it uses less digits than its factorization.

72122836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137774 (or 137772 counting only the distinct ones).

The product of its digits is 8064, while the sum is 31.

The square root of 72122836 is about 8492.5164703991. The cubic root of 72122836 is about 416.2532127676.

The spelling of 72122836 in words is "seventy-two million, one hundred twenty-two thousand, eight hundred thirty-six".