72443330 has 32 divisors (see below), whose sum is σ = 137635200. Its totient is φ = 27398272.

The previous prime is 72443321. The next prime is 72443339. The reversal of 72443330 is 3334427.

It is an interprime number because it is at equal distance from previous prime (72443321) and next prime (72443339).

It is a super-2 number, since 2×72443330² = 10496072122977800, 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 72443330.

It is not an unprimeable number, because it can be changed into a prime (72443339) 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 15 ways as a sum of consecutive naturals, for example, 18701 + ... + 22239.

It is an arithmetic number, because the mean of its divisors is an integer number (4301100).

Almost surely, 2^72443330 is an apocalyptic number.

72443330 is a deficient number, since it is larger than the sum of its proper divisors (65191870).

72443330 is a wasteful number, since it uses less digits than its factorization.

72443330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3658.

The product of its (nonzero) digits is 6048, while the sum is 26.

The square root of 72443330 is about 8511.3647554314. The cubic root of 72443330 is about 416.8688732319.

Adding to 72443330 its reverse (3334427), we get a palindrome (75777757).

The spelling of 72443330 in words is "seventy-two million, four hundred forty-three thousand, three hundred thirty".