72006442 has 8 divisors (see below), whose sum is σ = 108160416. Its totient is φ = 35952972.

The previous prime is 72006437. The next prime is 72006457. The reversal of 72006442 is 24460027.

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

It is an unprimeable number.

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, 23308 + ... + 26215.

It is an arithmetic number, because the mean of its divisors is an integer number (13520052).

Almost surely, 2^72006442 is an apocalyptic number.

72006442 is a deficient number, since it is larger than the sum of its proper divisors (36153974).

72006442 is a wasteful number, since it uses less digits than its factorization.

72006442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50252.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 72006442 is about 8485.6609642384. The cubic root of 72006442 is about 416.0291715552.

Adding to 72006442 its reverse (24460027), we get a palindrome (96466469).

The spelling of 72006442 in words is "seventy-two million, six thousand, four hundred forty-two".