4947947478 has 128 divisors (see below), whose sum is σ = 12001651200. Its totient is φ = 1504935936.

The previous prime is 4947947467. The next prime is 4947947531. The reversal of 4947947478 is 8747497494.

4947947478 is a `hidden beast` number, since 4 + 94 + 7 + 9 + 474 + 78 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6433878 + ... + 6434646.

It is an arithmetic number, because the mean of its divisors is an integer number (93762900).

Almost surely, 2^4947947478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4947947478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6000825600).

4947947478 is an abundant number, since it is smaller than the sum of its proper divisors (7053703722).

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

4947947478 is a wasteful number, since it uses less digits than its factorization.

4947947478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003 (or 997 counting only the distinct ones).

The product of its digits is 56899584, while the sum is 63.

The square root of 4947947478 is about 70341.6482462559. The cubic root of 4947947478 is about 1704.0213310660.

The spelling of 4947947478 in words is "four billion, nine hundred forty-seven million, nine hundred forty-seven thousand, four hundred seventy-eight".