72443427 has 16 divisors (see below), whose sum is σ = 110588160. Its totient is φ = 41321952.

The previous prime is 72443389. The next prime is 72443429. The reversal of 72443427 is 72434427.

It is a de Polignac number, because none of the positive numbers 2^k-72443427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72443429) 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, 10213 + ... + 15785.

It is an arithmetic number, because the mean of its divisors is an integer number (6911760).

Almost surely, 2^72443427 is an apocalyptic number.

72443427 is a deficient number, since it is larger than the sum of its proper divisors (38144733).

72443427 is a wasteful number, since it uses less digits than its factorization.

72443427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6202.

The product of its digits is 37632, while the sum is 33.

The square root of 72443427 is about 8511.3704536931. The cubic root of 72443427 is about 416.8690592912.

The spelling of 72443427 in words is "seventy-two million, four hundred forty-three thousand, four hundred twenty-seven".