71983340 has 48 divisors (see below), whose sum is σ = 177599520. Its totient is φ = 24161280.

The previous prime is 71983339. The next prime is 71983349. The reversal of 71983340 is 4338917.

It is a self number, because there is not a number n which added to its sum of digits gives 71983340.

It is not an unprimeable number, because it can be changed into a prime (71983349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9725 + ... + 15444.

It is an arithmetic number, because the mean of its divisors is an integer number (3699990).

Almost surely, 2^71983340 is an apocalyptic number.

It is an amenable number.

71983340 is an abundant number, since it is smaller than the sum of its proper divisors (105616180).

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

71983340 is a wasteful number, since it uses less digits than its factorization.

71983340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25202 (or 25200 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 71983340 is about 8484.2996175288. The cubic root of 71983340 is about 415.9846749162.

The spelling of 71983340 in words is "seventy-one million, nine hundred eighty-three thousand, three hundred forty".