947780 has 12 divisors (see below), whose sum is σ = 1990380. Its totient is φ = 379104.

The previous prime is 947773. The next prime is 947783. The reversal of 947780 is 87749.

947780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 141376 + 806404 = 376^2 + 898^2 .

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 947780.

It is not an unprimeable number, because it can be changed into a prime (947783) by changing a digit.

947780 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 3 ways as a sum of consecutive naturals, for example, 23675 + ... + 23714.

It is an arithmetic number, because the mean of its divisors is an integer number (165865).

2⁹⁴⁷⁷⁸⁰ is an apocalyptic number.

It is an amenable number.

947780 is an abundant number, since it is smaller than the sum of its proper divisors (1042600).

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

947780 is a wasteful number, since it uses less digits than its factorization.

947780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47398 (or 47396 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 947780 is about 973.5399324116. The cubic root of 947780 is about 98.2281232923.

The spelling of 947780 in words is "nine hundred forty-seven thousand, seven hundred eighty".