47478618 has 48 divisors (see below), whose sum is σ = 114090912. Its totient is φ = 14148000.

The previous prime is 47478611. The next prime is 47478649. The reversal of 47478618 is 81687474.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (47478611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10113 + ... + 14043.

It is an arithmetic number, because the mean of its divisors is an integer number (2376894).

Almost surely, 2^47478618 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47478618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57045456).

47478618 is an abundant number, since it is smaller than the sum of its proper divisors (66612294).

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

47478618 is a wasteful number, since it uses less digits than its factorization.

47478618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4011 (or 4008 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 47478618 is about 6890.4729881192. The cubic root of 47478618 is about 362.1034725526.

Subtracting 47478618 from its reverse (81687474), we obtain a triangular number (34208856 = T₈₂₇₁).

The spelling of 47478618 in words is "forty-seven million, four hundred seventy-eight thousand, six hundred eighteen".