87563144 has 8 divisors (see below), whose sum is σ = 164180910. Its totient is φ = 43781568.

The previous prime is 87563143. The next prime is 87563149. The reversal of 87563144 is 44136578.

It can be written as a sum of positive squares in only one way, i.e., 82992100 + 4571044 = 9110^2 + 2138^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 87563098 and 87563107.

It is not an unprimeable number, because it can be changed into a prime (87563143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5472689 + ... + 5472704.

Almost surely, 2^87563144 is an apocalyptic number.

It is an amenable number.

87563144 is a deficient number, since it is larger than the sum of its proper divisors (76617766).

87563144 is a wasteful number, since it uses less digits than its factorization.

87563144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10945399 (or 10945395 counting only the distinct ones).

The product of its digits is 80640, while the sum is 38.

The square root of 87563144 is about 9357.5180470037. The cubic root of 87563144 is about 444.0587672125.

The spelling of 87563144 in words is "eighty-seven million, five hundred sixty-three thousand, one hundred forty-four".