72118426 has 8 divisors (see below), whose sum is σ = 110816244. Its totient is φ = 35179680.

The previous prime is 72118367. The next prime is 72118427. The reversal of 72118426 is 62481127.

It can be written as a sum of positive squares in 2 ways, for example, as 71995225 + 123201 = 8485^2 + 351^2 .

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

It is a super-4 number, since 4×72118426⁴ (a number of 33 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (72118427) 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 3 ways as a sum of consecutive naturals, for example, 439665 + ... + 439828.

Almost surely, 2^72118426 is an apocalyptic number.

72118426 is a deficient number, since it is larger than the sum of its proper divisors (38697818).

72118426 is a wasteful number, since it uses less digits than its factorization.

72118426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879536.

The product of its digits is 5376, while the sum is 31.

The square root of 72118426 is about 8492.2568260740. The cubic root of 72118426 is about 416.2447285658.

The spelling of 72118426 in words is "seventy-two million, one hundred eighteen thousand, four hundred twenty-six".