71908840 has 32 divisors (see below), whose sum is σ = 167016960. Its totient is φ = 27835200.

The previous prime is 71908819. The next prime is 71908841. The reversal of 71908840 is 4880917.

It is a self number, because there is not a number n which added to its sum of digits gives 71908840.

It is not an unprimeable number, because it can be changed into a prime (71908841) 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, 27756 + ... + 30235.

It is an arithmetic number, because the mean of its divisors is an integer number (5219280).

Almost surely, 2^71908840 is an apocalyptic number.

It is an amenable number.

71908840 is an abundant number, since it is smaller than the sum of its proper divisors (95108120).

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

71908840 is a wasteful number, since it uses less digits than its factorization.

71908840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58033 (or 58029 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 71908840 is about 8479.9080183691. The cubic root of 71908840 is about 415.8411159766.

The spelling of 71908840 in words is "seventy-one million, nine hundred eight thousand, eight hundred forty".