47666628 has 36 divisors (see below), whose sum is σ = 120878940. Its totient is φ = 15837696.

The previous prime is 47666617. The next prime is 47666629. The reversal of 47666628 is 82666674.

It can be written as a sum of positive squares in 2 ways, for example, as 9622404 + 38044224 = 3102^2 + 6168^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (47666629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10168 + ... + 14096.

Almost surely, 2^47666628 is an apocalyptic number.

It is an amenable number.

47666628 is an abundant number, since it is smaller than the sum of its proper divisors (73212312).

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

47666628 is a wasteful number, since it uses less digits than its factorization.

47666628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4276 (or 4271 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 47666628 is about 6904.1022588024. The cubic root of 47666628 is about 362.5808060842.

The spelling of 47666628 in words is "forty-seven million, six hundred sixty-six thousand, six hundred twenty-eight".