72443842 has 8 divisors (see below), whose sum is σ = 108899856. Its totient is φ = 36143892.

The previous prime is 72443837. The next prime is 72443849. The reversal of 72443842 is 24834427.

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

It is a super-2 number, since 2×72443842² = 10496220487441928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72443798 and 72443807.

It is not an unprimeable number, because it can be changed into a prime (72443849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37848 + ... + 39715.

It is an arithmetic number, because the mean of its divisors is an integer number (13612482).

Almost surely, 2^72443842 is an apocalyptic number.

72443842 is a deficient number, since it is larger than the sum of its proper divisors (36456014).

72443842 is a wasteful number, since it uses less digits than its factorization.

72443842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78032.

The product of its digits is 43008, while the sum is 34.

The square root of 72443842 is about 8511.3948328109. The cubic root of 72443842 is about 416.8698553162.

The spelling of 72443842 in words is "seventy-two million, four hundred forty-three thousand, eight hundred forty-two".