72126448 has 20 divisors (see below), whose sum is σ = 139878448. Its totient is φ = 36028800.

The previous prime is 72126443. The next prime is 72126449. The reversal of 72126448 is 84462127.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72126443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27565 + ... + 30067.

Almost surely, 2^72126448 is an apocalyptic number.

It is an amenable number.

72126448 is a deficient number, since it is larger than the sum of its proper divisors (67752000).

72126448 is a wasteful number, since it uses less digits than its factorization.

72126448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4312 (or 4306 counting only the distinct ones).

The product of its digits is 21504, while the sum is 34.

The square root of 72126448 is about 8492.7291255520. The cubic root of 72126448 is about 416.2601614752.

The spelling of 72126448 in words is "seventy-two million, one hundred twenty-six thousand, four hundred forty-eight".