47909540 has 24 divisors (see below), whose sum is σ = 114983232. Its totient is φ = 16426080.

The previous prime is 47909527. The next prime is 47909549. The reversal of 47909540 is 4590974.

It is a junction number, because it is equal to n+sod(n) for n = 47909494 and 47909503.

It is not an unprimeable number, because it can be changed into a prime (47909549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170966 + ... + 171245.

It is an arithmetic number, because the mean of its divisors is an integer number (4790968).

Almost surely, 2^47909540 is an apocalyptic number.

It is an amenable number.

47909540 is an abundant number, since it is smaller than the sum of its proper divisors (67073692).

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

47909540 is a wasteful number, since it uses less digits than its factorization.

47909540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342227 (or 342225 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 47909540 is about 6921.6717633820. The cubic root of 47909540 is about 363.1956739864.

The spelling of 47909540 in words is "forty-seven million, nine hundred nine thousand, five hundred forty".