869486688 has 144 divisors (see below), whose sum is σ = 2836544256. Its totient is φ = 247484160.

The previous prime is 869486603. The next prime is 869486689. The reversal of 869486688 is 886684968.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869486689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 666645 + ... + 667947.

It is an arithmetic number, because the mean of its divisors is an integer number (19698224).

Almost surely, 2^869486688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 869486688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1418272128).

869486688 is an abundant number, since it is smaller than the sum of its proper divisors (1967057568).

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

869486688 is a wasteful number, since it uses less digits than its factorization.

869486688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1657 (or 1646 counting only the distinct ones).

The product of its digits is 31850496, while the sum is 63.

The square root of 869486688 is about 29487.0596703028. The cubic root of 869486688 is about 954.4524836897.

It can be divided in two parts, 86948 and 6688, that added together give a square (93636 = 306²).

The spelling of 869486688 in words is "eight hundred sixty-nine million, four hundred eighty-six thousand, six hundred eighty-eight".