72140226 has 32 divisors (see below), whose sum is σ = 157118400. Its totient is φ = 21994560.

The previous prime is 72140221. The next prime is 72140239. The reversal of 72140226 is 62204127.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 72140196 and 72140205.

It is not an unprimeable number, because it can be changed into a prime (72140221) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 7605 + ... + 14216.

It is an arithmetic number, because the mean of its divisors is an integer number (4909950).

Almost surely, 2^72140226 is an apocalyptic number.

72140226 is an abundant number, since it is smaller than the sum of its proper divisors (84978174).

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

72140226 is a wasteful number, since it uses less digits than its factorization.

72140226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21874.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 72140226 is about 8493.5402512733. The cubic root of 72140226 is about 416.2866652405.

The spelling of 72140226 in words is "seventy-two million, one hundred forty thousand, two hundred twenty-six".