87718556 has 6 divisors (see below), whose sum is σ = 153507480. Its totient is φ = 43859276.

The previous prime is 87718541. The next prime is 87718559. The reversal of 87718556 is 65581778.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 87718556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87718559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10964816 + ... + 10964823.

It is an arithmetic number, because the mean of its divisors is an integer number (25584580).

Almost surely, 2^87718556 is an apocalyptic number.

It is an amenable number.

87718556 is a deficient number, since it is larger than the sum of its proper divisors (65788924).

87718556 is a wasteful number, since it uses less digits than its factorization.

87718556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21929643 (or 21929641 counting only the distinct ones).

The product of its digits is 470400, while the sum is 47.

The square root of 87718556 is about 9365.8184906606. The cubic root of 87718556 is about 444.3213254433.

The spelling of 87718556 in words is "eighty-seven million, seven hundred eighteen thousand, five hundred fifty-six".