87997688 has 8 divisors (see below), whose sum is σ = 164995680. Its totient is φ = 43998840.

The previous prime is 87997681. The next prime is 87997699. The reversal of 87997688 is 88679978.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 87997688.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87997681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5499848 + ... + 5499863.

It is an arithmetic number, because the mean of its divisors is an integer number (20624460).

Almost surely, 2^87997688 is an apocalyptic number.

It is an amenable number.

87997688 is a deficient number, since it is larger than the sum of its proper divisors (76997992).

87997688 is a wasteful number, since it uses less digits than its factorization.

87997688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10999717 (or 10999713 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 62.

The square root of 87997688 is about 9380.7082888234. The cubic root of 87997688 is about 444.7921227449.

The spelling of 87997688 in words is "eighty-seven million, nine hundred ninety-seven thousand, six hundred eighty-eight".