47728017 has 12 divisors (see below), whose sum is σ = 69034420. Its totient is φ = 31775328.

The previous prime is 47728001. The next prime is 47728049. The reversal of 47728017 is 71082774.

It can be written as a sum of positive squares in 2 ways, for example, as 9979281 + 37748736 = 3159^2 + 6144^2 .

It is not a de Polignac number, because 47728017 - 2⁴ = 47728001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47728067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4263 + ... + 10659.

Almost surely, 2^47728017 is an apocalyptic number.

It is an amenable number.

47728017 is a deficient number, since it is larger than the sum of its proper divisors (21306403).

47728017 is a wasteful number, since it uses less digits than its factorization.

47728017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7232 (or 7229 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 36.

The square root of 47728017 is about 6908.5466633728. The cubic root of 47728017 is about 362.7363930951.

The spelling of 47728017 in words is "forty-seven million, seven hundred twenty-eight thousand, seventeen".