869385144 has 16 divisors (see below), whose sum is σ = 2173462920. Its totient is φ = 289795040.

The previous prime is 869385079. The next prime is 869385157. The reversal of 869385144 is 441583968.

It is a junction number, because it is equal to n+sod(n) for n = 869385093 and 869385102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18112167 + ... + 18112214.

Almost surely, 2^869385144 is an apocalyptic number.

It is an amenable number.

869385144 is an abundant number, since it is smaller than the sum of its proper divisors (1304077776).

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

869385144 is a wasteful number, since it uses less digits than its factorization.

869385144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36224390 (or 36224386 counting only the distinct ones).

The product of its digits is 829440, while the sum is 48.

The square root of 869385144 is about 29485.3377799882. The cubic root of 869385144 is about 954.4153266339.

The spelling of 869385144 in words is "eight hundred sixty-nine million, three hundred eighty-five thousand, one hundred forty-four".