87122178 has 144 divisors (see below), whose sum is σ = 237896568. Its totient is φ = 22809600.

The previous prime is 87122153. The next prime is 87122219.

It is a happy number.

87122178 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 43996689 + 43125489 = 6633^2 + 6567^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 481248 + ... + 481428.

Almost surely, 2^87122178 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87122178, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118948284).

87122178 is an abundant number, since it is smaller than the sum of its proper divisors (150774390).

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

87122178 is a wasteful number, since it uses less digits than its factorization.

87122178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241 (or 227 counting only the distinct ones).

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

The square root of 87122178 is about 9333.9261835521. The cubic root of 87122178 is about 443.3120891071.

It can be divided in two parts, 8712 and 2178, that multiplied together give a 4-th power (18974736 = 66⁴).

The spelling of 87122178 in words is "eighty-seven million, one hundred twenty-two thousand, one hundred seventy-eight".