87120606244 has 81 divisors (see below), whose sum is σ = 183932155953. Its totient is φ = 36000318816.

The previous prime is 87120606241. The next prime is 87120606301. The reversal of 87120606244 is 44260602178.

It is a happy number.

The square root of 87120606244 is 295162.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 45683932644 + 41436673600 = 213738^2 + 203560^2 .

It is a junction number, because it is equal to n+sod(n) for n = 87120606197 and 87120606206.

It is not an unprimeable number, because it can be changed into a prime (87120606241) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 119835409 + ... + 119836135.

Almost surely, 2^87120606244 is an apocalyptic number.

87120606244 is the 295162-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87120606244

87120606244 is an abundant number, since it is smaller than the sum of its proper divisors (96811549709).

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

87120606244 is an equidigital number, since it uses as much as digits as its factorization.

87120606244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1530 (or 765 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 40.

The spelling of 87120606244 in words is "eighty-seven billion, one hundred twenty million, six hundred six thousand, two hundred forty-four".