869440 has 112 divisors (see below), whose sum is σ = 2560320. Its totient is φ = 276480.

The previous prime is 869437. The next prime is 869443. The reversal of 869440 is 44968.

It is an interprime number because it is at equal distance from previous prime (869437) and next prime (869443).

It is a plaindrome in base 14.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45751 + ... + 45769.

It is an arithmetic number, because the mean of its divisors is an integer number (22860).

2⁸⁶⁹⁴⁴⁰ is an apocalyptic number.

869440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 869440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1280160).

869440 is an abundant number, since it is smaller than the sum of its proper divisors (1690880).

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

869440 is a wasteful number, since it uses less digits than its factorization.

869440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60 (or 50 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 869440 is about 932.4376654769. The cubic root of 869440 is about 95.4435399941.

The spelling of 869440 in words is "eight hundred sixty-nine thousand, four hundred forty".