72440932 has 12 divisors (see below), whose sum is σ = 129863916. Its totient is φ = 35336960.

The previous prime is 72440909. The next prime is 72440933. The reversal of 72440932 is 23904427.

It can be written as a sum of positive squares in 2 ways, for example, as 27604516 + 44836416 = 5254^2 + 6696^2 .

It is a junction number, because it is equal to n+sod(n) for n = 72440894 and 72440903.

It is not an unprimeable number, because it can be changed into a prime (72440933) 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, 220693 + ... + 221020.

It is an arithmetic number, because the mean of its divisors is an integer number (10821993).

Almost surely, 2^72440932 is an apocalyptic number.

It is an amenable number.

72440932 is a deficient number, since it is larger than the sum of its proper divisors (57422984).

72440932 is a wasteful number, since it uses less digits than its factorization.

72440932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441758 (or 441756 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 72440932 is about 8511.2238837902. The cubic root of 72440932 is about 416.8642734867.

The spelling of 72440932 in words is "seventy-two million, four hundred forty thousand, nine hundred thirty-two".