9947017428 has 12 divisors (see below), whose sum is σ = 23209707360. Its totient is φ = 3315672472.

The previous prime is 9947017397. The next prime is 9947017447. The reversal of 9947017428 is 8247107499.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 414459048 + ... + 414459071.

It is an arithmetic number, because the mean of its divisors is an integer number (1934142280).

Almost surely, 2^9947017428 is an apocalyptic number.

It is an amenable number.

9947017428 is an abundant number, since it is smaller than the sum of its proper divisors (13262689932).

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

9947017428 is a wasteful number, since it uses less digits than its factorization.

9947017428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828918126 (or 828918124 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 51.

The square root of 9947017428 is about 99734.7353132298. The cubic root of 9947017428 is about 2150.6230340042.

The spelling of 9947017428 in words is "nine billion, nine hundred forty-seven million, seventeen thousand, four hundred twenty-eight".