71682740 has 12 divisors (see below), whose sum is σ = 150533796. Its totient is φ = 28673088.

The previous prime is 71682739. The next prime is 71682749. The reversal of 71682740 is 4728617.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11806096 + 59876644 = 3436^2 + 7738^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 71682740.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71682749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1792049 + ... + 1792088.

It is an arithmetic number, because the mean of its divisors is an integer number (12544483).

Almost surely, 2^71682740 is an apocalyptic number.

It is an amenable number.

71682740 is an abundant number, since it is smaller than the sum of its proper divisors (78851056).

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

71682740 is a wasteful number, since it uses less digits than its factorization.

71682740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3584146 (or 3584144 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 71682740 is about 8466.5660099004. The cubic root of 71682740 is about 415.4048210248.

The spelling of 71682740 in words is "seventy-one million, six hundred eighty-two thousand, seven hundred forty".