47439855 has 12 divisors (see below), whose sum is σ = 82229160. Its totient is φ = 25301232.

The previous prime is 47439839. The next prime is 47439859. The reversal of 47439855 is 55893474.

It is not a de Polignac number, because 47439855 - 2⁴ = 47439839 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1054219 = 47439855 / (4 + 7 + 4 + 3 + 9 + 8 + 5 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 47439855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47439859) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 527065 + ... + 527154.

It is an arithmetic number, because the mean of its divisors is an integer number (6852430).

Almost surely, 2^47439855 is an apocalyptic number.

47439855 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

47439855 is a deficient number, since it is larger than the sum of its proper divisors (34789305).

47439855 is a wasteful number, since it uses less digits than its factorization.

47439855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054230 (or 1054227 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 47439855 is about 6887.6596170252. The cubic root of 47439855 is about 362.0049015952.

The spelling of 47439855 in words is "forty-seven million, four hundred thirty-nine thousand, eight hundred fifty-five".