72439842 has 8 divisors (see below), whose sum is σ = 144879696. Its totient is φ = 24146612.

The previous prime is 72439841. The next prime is 72439847. The reversal of 72439842 is 24893427.

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

72439842 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 72439842.

It is not an unprimeable number, because it can be changed into a prime (72439841) 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, 6036648 + ... + 6036659.

It is an arithmetic number, because the mean of its divisors is an integer number (18109962).

Almost surely, 2^72439842 is an apocalyptic number.

72439842 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72439842 is a wasteful number, since it uses less digits than its factorization.

72439842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12073312.

The product of its digits is 96768, while the sum is 39.

The square root of 72439842 is about 8511.1598504552. The cubic root of 72439842 is about 416.8621826598.

The spelling of 72439842 in words is "seventy-two million, four hundred thirty-nine thousand, eight hundred forty-two".