881440 has 48 divisors (see below), whose sum is σ = 2382912. Its totient is φ = 301824.

The previous prime is 881437. The next prime is 881449. The reversal of 881440 is 44188.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (881449) 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, 727 + ... + 1513.

It is an arithmetic number, because the mean of its divisors is an integer number (49644).

2⁸⁸¹⁴⁴⁰ is an apocalyptic number.

881440 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 881440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1191456).

881440 is an abundant number, since it is smaller than the sum of its proper divisors (1501472).

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

881440 is a wasteful number, since it uses less digits than its factorization.

881440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809 (or 801 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 881440 is about 938.8503608137. The cubic root of 881440 is about 95.8806386910.

It can be divided in two parts, 881 and 440, that multiplied together give a triangular number (387640 = T₈₈₀).

The spelling of 881440 in words is "eight hundred eighty-one thousand, four hundred forty".