47809988 has 12 divisors (see below), whose sum is σ = 83824272. Its totient is φ = 23860200.

The previous prime is 47809987. The next prime is 47809991. The reversal of 47809988 is 88990874.

It is not an unprimeable number, because it can be changed into a prime (47809987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8738 + ... + 13113.

It is an arithmetic number, because the mean of its divisors is an integer number (6985356).

Almost surely, 2^47809988 is an apocalyptic number.

It is an amenable number.

47809988 is a deficient number, since it is larger than the sum of its proper divisors (36014284).

47809988 is a wasteful number, since it uses less digits than its factorization.

47809988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22402 (or 22400 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 53.

The square root of 47809988 is about 6914.4766974804. The cubic root of 47809988 is about 362.9439361744.

The spelling of 47809988 in words is "forty-seven million, eight hundred nine thousand, nine hundred eighty-eight".