71286940 has 24 divisors (see below), whose sum is σ = 149883552. Its totient is φ = 28480320.

The previous prime is 71286937. The next prime is 71286947. The reversal of 71286940 is 4968217.

It is a self number, because there is not a number n which added to its sum of digits gives 71286940.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71286947) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 20745 + ... + 23935.

It is an arithmetic number, because the mean of its divisors is an integer number (6245148).

Almost surely, 2^71286940 is an apocalyptic number.

It is an amenable number.

71286940 is an abundant number, since it is smaller than the sum of its proper divisors (78596612).

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

71286940 is a wasteful number, since it uses less digits than its factorization.

71286940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4317 (or 4315 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 71286940 is about 8443.1593612818. The cubic root of 71286940 is about 414.6388496876.

The spelling of 71286940 in words is "seventy-one million, two hundred eighty-six thousand, nine hundred forty".