71940724 has 12 divisors (see below), whose sum is σ = 125955648. Its totient is φ = 35953400.

The previous prime is 71940721. The next prime is 71940727. The reversal of 71940724 is 42704917.

It is an interprime number because it is at equal distance from previous prime (71940721) and next prime (71940727).

It is a self number, because there is not a number n which added to its sum of digits gives 71940724.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71940721) 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 3 ways as a sum of consecutive naturals, for example, 14709 + ... + 18979.

It is an arithmetic number, because the mean of its divisors is an integer number (10496304).

Almost surely, 2^71940724 is an apocalyptic number.

It is an amenable number.

71940724 is a deficient number, since it is larger than the sum of its proper divisors (54014924).

71940724 is a wasteful number, since it uses less digits than its factorization.

71940724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8486 (or 8484 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 71940724 is about 8481.7877832448. The cubic root of 71940724 is about 415.9025674802.

The spelling of 71940724 in words is "seventy-one million, nine hundred forty thousand, seven hundred twenty-four".