71813788 has 12 divisors (see below), whose sum is σ = 126507472. Its totient is φ = 35668800.

The previous prime is 71813771. The next prime is 71813821. The reversal of 71813788 is 88731817.

It is a happy number.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

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, 58845 + ... + 60052.

Almost surely, 2^71813788 is an apocalyptic number.

It is an amenable number.

71813788 is a deficient number, since it is larger than the sum of its proper divisors (54693684).

71813788 is a wasteful number, since it uses less digits than its factorization.

71813788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119052 (or 119050 counting only the distinct ones).

The product of its digits is 75264, while the sum is 43.

The square root of 71813788 is about 8474.3016231428. The cubic root of 71813788 is about 415.6578100090.

The spelling of 71813788 in words is "seventy-one million, eight hundred thirteen thousand, seven hundred eighty-eight".