72007742 has 4 divisors (see below), whose sum is σ = 108011616. Its totient is φ = 36003870.

The previous prime is 72007723. The next prime is 72007787. The reversal of 72007742 is 24770027.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×72007742² = 10370229815877128, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18001934 + ... + 18001937.

It is an arithmetic number, because the mean of its divisors is an integer number (27002904).

Almost surely, 2^72007742 is an apocalyptic number.

72007742 is a deficient number, since it is larger than the sum of its proper divisors (36003874).

72007742 is a wasteful number, since it uses less digits than its factorization.

72007742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36003873.

The product of its (nonzero) digits is 5488, while the sum is 29.

The square root of 72007742 is about 8485.7375637006. The cubic root of 72007742 is about 416.0316751954.

Adding to 72007742 its reverse (24770027), we get a palindrome (96777769).

The spelling of 72007742 in words is "seventy-two million, seven thousand, seven hundred forty-two".