47289918 has 48 divisors (see below), whose sum is σ = 103431600. Its totient is φ = 14406912.

The previous prime is 47289901. The next prime is 47289929. The reversal of 47289918 is 81998274.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 150930 + ... + 151242.

It is an arithmetic number, because the mean of its divisors is an integer number (2154825).

Almost surely, 2^47289918 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47289918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51715800).

47289918 is an abundant number, since it is smaller than the sum of its proper divisors (56141682).

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

47289918 is a wasteful number, since it uses less digits than its factorization.

47289918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493 (or 480 counting only the distinct ones).

The product of its digits is 290304, while the sum is 48.

The square root of 47289918 is about 6876.7665366799. The cubic root of 47289918 is about 361.6231184396.

The spelling of 47289918 in words is "forty-seven million, two hundred eighty-nine thousand, nine hundred eighteen".