72443312 has 20 divisors (see below), whose sum is σ = 140508120. Its totient is φ = 36183168.

The previous prime is 72443303. The next prime is 72443321. The reversal of 72443312 is 21334427.

It is an interprime number because it is at equal distance from previous prime (72443303) and next prime (72443321).

It is an unprimeable number.

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, 18764 + ... + 22292.

It is an arithmetic number, because the mean of its divisors is an integer number (7025406).

Almost surely, 2^72443312 is an apocalyptic number.

It is an amenable number.

72443312 is a deficient number, since it is larger than the sum of its proper divisors (68064808).

72443312 is a wasteful number, since it uses less digits than its factorization.

72443312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4820 (or 4814 counting only the distinct ones).

The product of its digits is 4032, while the sum is 26.

The square root of 72443312 is about 8511.3636980216. The cubic root of 72443312 is about 416.8688387054.

Adding to 72443312 its reverse (21334427), we get a palindrome (93777739).

The spelling of 72443312 in words is "seventy-two million, four hundred forty-three thousand, three hundred twelve".