87178122 has 24 divisors (see below), whose sum is σ = 191707776. Its totient is φ = 28625256.

The previous prime is 87178121. The next prime is 87178129. The reversal of 87178122 is 22187178.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (87178121) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 34938 + ... + 37349.

It is an arithmetic number, because the mean of its divisors is an integer number (7987824).

Almost surely, 2^87178122 is an apocalyptic number.

87178122 is an abundant number, since it is smaller than the sum of its proper divisors (104529654).

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

87178122 is a wasteful number, since it uses less digits than its factorization.

87178122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72362 (or 72359 counting only the distinct ones).

The product of its digits is 12544, while the sum is 36.

The square root of 87178122 is about 9336.9225122628. The cubic root of 87178122 is about 443.4069572013.

The spelling of 87178122 in words is "eighty-seven million, one hundred seventy-eight thousand, one hundred twenty-two".