71940012 has 24 divisors (see below), whose sum is σ = 168000000. Its totient is φ = 23960016.

The previous prime is 71939993. The next prime is 71940013. The reversal of 71940012 is 21004917.

It is not an unprimeable number, because it can be changed into a prime (71940013) 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, 22489 + ... + 25487.

It is an arithmetic number, because the mean of its divisors is an integer number (7000000).

Almost surely, 2^71940012 is an apocalyptic number.

It is an amenable number.

71940012 is an abundant number, since it is smaller than the sum of its proper divisors (96059988).

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

71940012 is a wasteful number, since it uses less digits than its factorization.

71940012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5005 (or 5003 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 71940012 is about 8481.7458108576. The cubic root of 71940012 is about 415.9011954080.

Adding to 71940012 its reverse (21004917), we get a palindrome (92944929).

The spelling of 71940012 in words is "seventy-one million, nine hundred forty thousand, twelve".