72226548 has 36 divisors (see below), whose sum is σ = 183177540. Its totient is φ = 23995776.

The previous prime is 72226547. The next prime is 72226571. The reversal of 72226548 is 84562227.

It can be written as a sum of positive squares in 2 ways, for example, as 26501904 + 45724644 = 5148^2 + 6762^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72226547) 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 11 ways as a sum of consecutive naturals, for example, 8248 + ... + 14576.

It is an arithmetic number, because the mean of its divisors is an integer number (5088265).

Almost surely, 2^72226548 is an apocalyptic number.

It is an amenable number.

72226548 is an abundant number, since it is smaller than the sum of its proper divisors (110950992).

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

72226548 is a wasteful number, since it uses less digits than its factorization.

72226548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6656 (or 6651 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 72226548 is about 8498.6203586229. The cubic root of 72226548 is about 416.4526400188.

The spelling of 72226548 in words is "seventy-two million, two hundred twenty-six thousand, five hundred forty-eight".