72040042 has 8 divisors (see below), whose sum is σ = 108572832. Its totient is φ = 35849100.

The previous prime is 72040037. The next prime is 72040061. The reversal of 72040042 is 24004027.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84934 + ... + 85777.

It is an arithmetic number, because the mean of its divisors is an integer number (13571604).

Almost surely, 2^72040042 is an apocalyptic number.

72040042 is a deficient number, since it is larger than the sum of its proper divisors (36532790).

72040042 is a wasteful number, since it uses less digits than its factorization.

72040042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170924.

The product of its (nonzero) digits is 448, while the sum is 19.

The square root of 72040042 is about 8487.6405437554. The cubic root of 72040042 is about 416.0938713519.

Adding to 72040042 its reverse (24004027), we get a palindrome (96044069).

The spelling of 72040042 in words is "seventy-two million, forty thousand, forty-two".