947748864 has 128 divisors (see below), whose sum is σ = 2617205760. Its totient is φ = 304742400.

The previous prime is 947748847. The next prime is 947748877. The reversal of 947748864 is 468847749.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

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, 3047269 + ... + 3047579.

It is an arithmetic number, because the mean of its divisors is an integer number (20446920).

Almost surely, 2^947748864 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 947748864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1308602880).

947748864 is an abundant number, since it is smaller than the sum of its proper divisors (1669456896).

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

947748864 is an equidigital number, since it uses as much as digits as its factorization.

947748864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375 (or 347 counting only the distinct ones).

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

The square root of 947748864 is about 30785.5301075034. The cubic root of 947748864 is about 982.2704763331.

The spelling of 947748864 in words is "nine hundred forty-seven million, seven hundred forty-eight thousand, eight hundred sixty-four".