87787656 has 96 divisors (see below), whose sum is σ = 261144000. Its totient is φ = 26421120.

The previous prime is 87787631. The next prime is 87787673. The reversal of 87787656 is 65678778.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 157330 + ... + 157886.

It is an arithmetic number, because the mean of its divisors is an integer number (2720250).

Almost surely, 2^87787656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87787656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130572000).

87787656 is an abundant number, since it is smaller than the sum of its proper divisors (173356344).

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

87787656 is a wasteful number, since it uses less digits than its factorization.

87787656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779 (or 772 counting only the distinct ones).

The product of its digits is 3951360, while the sum is 54.

The square root of 87787656 is about 9369.5067106012. The cubic root of 87787656 is about 444.4379657019.

The spelling of 87787656 in words is "eighty-seven million, seven hundred eighty-seven thousand, six hundred fifty-six".