947808 has 48 divisors (see below), whose sum is σ = 2766960. Its totient is φ = 315648.

The previous prime is 947803. The next prime is 947819. The reversal of 947808 is 808749.

947808 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 (48).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nialpdrome in base 16.

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 947808.

It is not an unprimeable number, because it can be changed into a prime (947803) by changing a digit.

947808 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 7 ways as a sum of consecutive naturals, for example, 316 + ... + 1412.

It is an arithmetic number, because the mean of its divisors is an integer number (57645).

2⁹⁴⁷⁸⁰⁸ 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 947808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1383480).

947808 is an abundant number, since it is smaller than the sum of its proper divisors (1819152).

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

947808 is a wasteful number, since it uses less digits than its factorization.

947808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116 (or 1102 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 947808 is about 973.5543128146. The cubic root of 947808 is about 98.2290905915.

The spelling of 947808 in words is "nine hundred forty-seven thousand, eight hundred eight".