72705112 has 8 divisors (see below), whose sum is σ = 136322100. Its totient is φ = 36352552.

The previous prime is 72705103. The next prime is 72705119. The reversal of 72705112 is 21150727.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72705119) by changing a digit.

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, 4544062 + ... + 4544077.

Almost surely, 2^72705112 is an apocalyptic number.

It is an amenable number.

72705112 is a deficient number, since it is larger than the sum of its proper divisors (63616988).

72705112 is a wasteful number, since it uses less digits than its factorization.

72705112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9088145 (or 9088141 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 72705112 is about 8526.7292674272. The cubic root of 72705112 is about 417.3704035591.

Adding to 72705112 its reverse (21150727), we get a palindrome (93855839).

The spelling of 72705112 in words is "seventy-two million, seven hundred five thousand, one hundred twelve".