87768620 has 24 divisors (see below), whose sum is σ = 195156864. Its totient is φ = 33042176.

The previous prime is 87768613. The next prime is 87768647. The reversal of 87768620 is 2686778.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128732 + ... + 129411.

It is an arithmetic number, because the mean of its divisors is an integer number (8131536).

Almost surely, 2^87768620 is an apocalyptic number.

It is an amenable number.

87768620 is an abundant number, since it is smaller than the sum of its proper divisors (107388244).

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

87768620 is a wasteful number, since it uses less digits than its factorization.

87768620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258169 (or 258167 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 44.

The square root of 87768620 is about 9368.4908069550. The cubic root of 87768620 is about 444.4058391931.

It can be divided in two parts, 87768 and 620, that added together give a palindrome (88388).

The spelling of 87768620 in words is "eighty-seven million, seven hundred sixty-eight thousand, six hundred twenty".