87905078244 has 18 divisors (see below), whose sum is σ = 222204503430. Its totient is φ = 29301692736.

The previous prime is 87905078189. The next prime is 87905078267. The reversal of 87905078244 is 44287050978.

It is a happy number.

87905078244 is a `hidden beast` number, since 8 + 7 + 90 + 507 + 8 + 2 + 44 = 666.

It can be written as a sum of positive squares in only one way, i.e., 46521313344 + 41383764900 = 215688^2 + 203430^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1220903829 + ... + 1220903900.

It is an arithmetic number, because the mean of its divisors is an integer number (12344694635).

Almost surely, 2^87905078244 is an apocalyptic number.

It is an amenable number.

87905078244 is an abundant number, since it is smaller than the sum of its proper divisors (134299425186).

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

87905078244 is a wasteful number, since it uses less digits than its factorization.

87905078244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2441807739 (or 2441807734 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 54.

The spelling of 87905078244 in words is "eighty-seven billion, nine hundred five million, seventy-eight thousand, two hundred forty-four".