847440 has 120 divisors (see below), whose sum is σ = 3133728. Its totient is φ = 203520.

The previous prime is 847423. The next prime is 847453. The reversal of 847440 is 44748.

847440 = T₆₅ + T₆₆ + ... + T₁₇₄.

847440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 847440.

It is an unprimeable number.

847440 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7867 + ... + 7973.

2⁸⁴⁷⁴⁴⁰ is an apocalyptic number.

847440 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 847440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1566864).

847440 is an abundant number, since it is smaller than the sum of its proper divisors (2286288).

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

847440 is a wasteful number, since it uses less digits than its factorization.

847440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 847440 is about 920.5650438725. The cubic root of 847440 is about 94.6316297858.

The spelling of 847440 in words is "eight hundred forty-seven thousand, four hundred forty".