869749376 has 64 divisors (see below), whose sum is σ = 1841930280. Its totient is φ = 407666688.

The previous prime is 869749367. The next prime is 869749379. The reversal of 869749376 is 673947968.

It can be written as a sum of positive squares in 4 ways, for example, as 656589376 + 213160000 = 25624^2 + 14600^2 .

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

It is not an unprimeable number, because it can be changed into a prime (869749379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 680450 + ... + 681726.

Almost surely, 2^869749376 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 869749376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (920965140).

869749376 is an abundant number, since it is smaller than the sum of its proper divisors (972180904).

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

869749376 is a wasteful number, since it uses less digits than its factorization.

869749376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1621 (or 1609 counting only the distinct ones).

The product of its digits is 13716864, while the sum is 59.

The square root of 869749376 is about 29491.5136268046. The cubic root of 869749376 is about 954.5485932573.

The spelling of 869749376 in words is "eight hundred sixty-nine million, seven hundred forty-nine thousand, three hundred seventy-six".