47784140 has 24 divisors (see below), whose sum is σ = 101385312. Its totient is φ = 18915840.

The previous prime is 47784119. The next prime is 47784173. The reversal of 47784140 is 4148774.

It is a self number, because there is not a number n which added to its sum of digits gives 47784140.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10376 + ... + 14255.

It is an arithmetic number, because the mean of its divisors is an integer number (4224388).

Almost surely, 2^47784140 is an apocalyptic number.

It is an amenable number.

47784140 is an abundant number, since it is smaller than the sum of its proper divisors (53601172).

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

47784140 is a wasteful number, since it uses less digits than its factorization.

47784140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24737 (or 24735 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 35.

The square root of 47784140 is about 6912.6073228558. The cubic root of 47784140 is about 362.8785170265.

The spelling of 47784140 in words is "forty-seven million, seven hundred eighty-four thousand, one hundred forty".