947856864 has 48 divisors (see below), whose sum is σ = 2596309632. Its totient is φ = 302214528.

The previous prime is 947856827. The next prime is 947856881. The reversal of 947856864 is 468658749.

It is a tau number, because it is divible by the number of its divisors (48).

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, 212434 + ... + 216849.

It is an arithmetic number, because the mean of its divisors is an integer number (54089784).

Almost surely, 2^947856864 is an apocalyptic number.

It is an amenable number.

947856864 is an abundant number, since it is smaller than the sum of its proper divisors (1648452768).

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

947856864 is a wasteful number, since it uses less digits than its factorization.

947856864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429319 (or 429311 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 57.

The square root of 947856864 is about 30787.2841283540. The cubic root of 947856864 is about 982.3077862106.

The spelling of 947856864 in words is "nine hundred forty-seven million, eight hundred fifty-six thousand, eight hundred sixty-four".