47709918 has 16 divisors (see below), whose sum is σ = 106022160. Its totient is φ = 15903288.

The previous prime is 47709881. The next prime is 47709923. The reversal of 47709918 is 81990774.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 441705 + ... + 441812.

It is an arithmetic number, because the mean of its divisors is an integer number (6626385).

Almost surely, 2^47709918 is an apocalyptic number.

47709918 is an abundant number, since it is smaller than the sum of its proper divisors (58312242).

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

47709918 is a wasteful number, since it uses less digits than its factorization.

47709918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883528 (or 883522 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 47709918 is about 6907.2366399306. The cubic root of 47709918 is about 362.6905360602.

The spelling of 47709918 in words is "forty-seven million, seven hundred nine thousand, nine hundred eighteen".