47855440 has 20 divisors (see below), whose sum is σ = 111264084. Its totient is φ = 19142144.

The previous prime is 47855419. The next prime is 47855441. The reversal of 47855440 is 4455874.

47855440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 35856144 + 11999296 = 5988^2 + 3464^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 47855440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47855441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299017 + ... + 299176.

Almost surely, 2^47855440 is an apocalyptic number.

47855440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47855440 is an abundant number, since it is smaller than the sum of its proper divisors (63408644).

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

47855440 is a wasteful number, since it uses less digits than its factorization.

47855440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598206 (or 598200 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 37.

The square root of 47855440 is about 6917.7626440924. The cubic root of 47855440 is about 363.0589142616.

The spelling of 47855440 in words is "forty-seven million, eight hundred fifty-five thousand, four hundred forty".