72643443 has 8 divisors (see below), whose sum is σ = 98685648. Its totient is φ = 47515104.

The previous prime is 72643433. The next prime is 72643451. The reversal of 72643443 is 34434627.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72643443 - 2⁴ = 72643427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72643433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228280 + ... + 228597.

It is an arithmetic number, because the mean of its divisors is an integer number (12335706).

Almost surely, 2^72643443 is an apocalyptic number.

72643443 is a deficient number, since it is larger than the sum of its proper divisors (26042205).

72643443 is a wasteful number, since it uses less digits than its factorization.

72643443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456933.

The product of its digits is 48384, while the sum is 33.

The square root of 72643443 is about 8523.1122836673. The cubic root of 72643443 is about 417.2523646509.

The spelling of 72643443 in words is "seventy-two million, six hundred forty-three thousand, four hundred forty-three".