72004442 has 8 divisors (see below), whose sum is σ = 110925876. Its totient is φ = 35029152.

The previous prime is 72004441. The next prime is 72004447. The reversal of 72004442 is 24440027.

It can be written as a sum of positive squares in 2 ways, for example, as 67256401 + 4748041 = 8201^2 + 2179^2 .

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

It is not an unprimeable number, because it can be changed into a prime (72004441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 486443 + ... + 486590.

Almost surely, 2^72004442 is an apocalyptic number.

72004442 is a deficient number, since it is larger than the sum of its proper divisors (38921434).

72004442 is a wasteful number, since it uses less digits than its factorization.

72004442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973072.

The product of its (nonzero) digits is 1792, while the sum is 23.

The square root of 72004442 is about 8485.5431175618. The cubic root of 72004442 is about 416.0253197422.

Adding to 72004442 its reverse (24440027), we get a palindrome (96444469).

The spelling of 72004442 in words is "seventy-two million, four thousand, four hundred forty-two".