947847864 has 32 divisors (see below), whose sum is σ = 2396250000. Its totient is φ = 312398592.

The previous prime is 947847827. The next prime is 947847877. The reversal of 947847864 is 468748749.

It is a happy number.

947847864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219739 + ... + 224010.

Almost surely, 2^947847864 is an apocalyptic number.

It is an amenable number.

947847864 is an abundant number, since it is smaller than the sum of its proper divisors (1448402136).

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

947847864 is a wasteful number, since it uses less digits than its factorization.

947847864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443847 (or 443843 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 57.

The square root of 947847864 is about 30787.1379637666. The cubic root of 947847864 is about 982.3046771624.

The spelling of 947847864 in words is "nine hundred forty-seven million, eight hundred forty-seven thousand, eight hundred sixty-four".