869660544 has 64 divisors (see below), whose sum is σ = 2410496640. Its totient is φ = 277280256.

The previous prime is 869660527. The next prime is 869660557. The reversal of 869660544 is 445066968.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 869660493 and 869660502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40402 + ... + 58065.

It is an arithmetic number, because the mean of its divisors is an integer number (37664010).

Almost surely, 2^869660544 is an apocalyptic number.

It is an amenable number.

869660544 is an abundant number, since it is smaller than the sum of its proper divisors (1540836096).

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

869660544 is a wasteful number, since it uses less digits than its factorization.

869660544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98507 (or 98495 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 48.

The square root of 869660544 is about 29490.0075279746. The cubic root of 869660544 is about 954.5160944901.

The spelling of 869660544 in words is "eight hundred sixty-nine million, six hundred sixty thousand, five hundred forty-four".