72243648 has 42 divisors (see below), whose sum is σ = 207075024. Its totient is φ = 24081024.

The previous prime is 72243641. The next prime is 72243673. The reversal of 72243648 is 84634227.

72243648 is a `hidden beast` number, since 7 + 2 + 2 + 4 + 3 + 648 = 666.

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 (72243641) 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 5 ways as a sum of consecutive naturals, for example, 62136 + ... + 63287.

Almost surely, 2^72243648 is an apocalyptic number.

It is an amenable number.

72243648 is an abundant number, since it is smaller than the sum of its proper divisors (134831376).

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

72243648 is a wasteful number, since it uses less digits than its factorization.

72243648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125441 (or 125428 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 72243648 is about 8499.6263447283. The cubic root of 72243648 is about 416.4855031807.

The spelling of 72243648 in words is "seventy-two million, two hundred forty-three thousand, six hundred forty-eight".