947440 has 40 divisors (see below), whose sum is σ = 2374848. Its totient is φ = 349440.

The previous prime is 947431. The next prime is 947449. The reversal of 947440 is 44749.

It is an interprime number because it is at equal distance from previous prime (947431) and next prime (947449).

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 947399 and 947408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (947449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 585 + ... + 1495.

2⁹⁴⁷⁴⁴⁰ 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 947440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1187424).

947440 is an abundant number, since it is smaller than the sum of its proper divisors (1427408).

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

947440 is a wasteful number, since it uses less digits than its factorization.

947440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937 (or 931 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 947440 is about 973.3652962788. The cubic root of 947440 is about 98.2163759964.

The spelling of 947440 in words is "nine hundred forty-seven thousand, four hundred forty".