72454244 has 24 divisors (see below), whose sum is σ = 128857848. Its totient is φ = 35642880.

The previous prime is 72454243. The next prime is 72454253. The reversal of 72454244 is 44245427.

It can be written as a sum of positive squares in 4 ways, for example, as 100 + 72454144 = 10^2 + 8512^2 .

It is a super-2 number, since 2×72454244² = 10499234947223072, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72454244.

It is not an unprimeable number, because it can be changed into a prime (72454243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70454 + ... + 71474.

It is an arithmetic number, because the mean of its divisors is an integer number (5369077).

Almost surely, 2^72454244 is an apocalyptic number.

It is an amenable number.

72454244 is a deficient number, since it is larger than the sum of its proper divisors (56403604).

72454244 is a wasteful number, since it uses less digits than its factorization.

72454244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295 (or 1293 counting only the distinct ones).

The product of its digits is 35840, while the sum is 32.

The square root of 72454244 is about 8512.0058740581. The cubic root of 72454244 is about 416.8898067369.

The spelling of 72454244 in words is "seventy-two million, four hundred fifty-four thousand, two hundred forty-four".