47947518 has 32 divisors (see below), whose sum is σ = 106924320. Its totient is φ = 15926400.

The previous prime is 47947517. The next prime is 47947541. The reversal of 47947518 is 81574974.

It is a happy number.

47947518 is a `hidden beast` number, since 47 + 94 + 7 + 518 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47947511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15718 + ... + 18518.

It is an arithmetic number, because the mean of its divisors is an integer number (3341385).

Almost surely, 2^47947518 is an apocalyptic number.

47947518 is an abundant number, since it is smaller than the sum of its proper divisors (58976802).

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

47947518 is a wasteful number, since it uses less digits than its factorization.

47947518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3129 (or 3123 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 47947518 is about 6924.4146322993. The cubic root of 47947518 is about 363.2916173150.

The spelling of 47947518 in words is "forty-seven million, nine hundred forty-seven thousand, five hundred eighteen".