72705012 has 24 divisors (see below), whose sum is σ = 171691296. Its totient is φ = 23942688.

The previous prime is 72705011. The next prime is 72705019. The reversal of 72705012 is 21050727.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72705011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35503 + ... + 37494.

It is an arithmetic number, because the mean of its divisors is an integer number (7153804).

Almost surely, 2^72705012 is an apocalyptic number.

It is an amenable number.

72705012 is an abundant number, since it is smaller than the sum of its proper divisors (98986284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72705012 is a wasteful number, since it uses less digits than its factorization.

72705012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73087 (or 73085 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 24.

The square root of 72705012 is about 8526.7234035120. The cubic root of 72705012 is about 417.3702122060.

Adding to 72705012 its reverse (21050727), we get a palindrome (93755739).

The spelling of 72705012 in words is "seventy-two million, seven hundred five thousand, twelve".