71888540 has 12 divisors (see below), whose sum is σ = 150965976. Its totient is φ = 28755408.

The previous prime is 71888527. The next prime is 71888581. The reversal of 71888540 is 4588817.

71888540 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

71888540 is strictly pandigital in base 9.

It is a congruent number.

It is an unprimeable number.

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, 1797194 + ... + 1797233.

It is an arithmetic number, because the mean of its divisors is an integer number (12580498).

Almost surely, 2^71888540 is an apocalyptic number.

It is an amenable number.

71888540 is an abundant number, since it is smaller than the sum of its proper divisors (79077436).

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

71888540 is a wasteful number, since it uses less digits than its factorization.

71888540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3594436 (or 3594434 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 41.

The square root of 71888540 is about 8478.7109869366. The cubic root of 71888540 is about 415.8019813855.

The spelling of 71888540 in words is "seventy-one million, eight hundred eighty-eight thousand, five hundred forty".