47784520 has 64 divisors (see below), whose sum is σ = 123770880. Its totient is φ = 16263936.

The previous prime is 47784509. The next prime is 47784523. The reversal of 47784520 is 2548774.

It is a self number, because there is not a number n which added to its sum of digits gives 47784520.

It is not an unprimeable number, because it can be changed into a prime (47784523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43417 + ... + 44503.

It is an arithmetic number, because the mean of its divisors is an integer number (1933920).

Almost surely, 2^47784520 is an apocalyptic number.

47784520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47784520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61885440).

47784520 is an abundant number, since it is smaller than the sum of its proper divisors (75986360).

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

47784520 is a wasteful number, since it uses less digits than its factorization.

47784520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262 (or 1258 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 37.

The square root of 47784520 is about 6912.6348088120. The cubic root of 47784520 is about 362.8794789459.

The spelling of 47784520 in words is "forty-seven million, seven hundred eighty-four thousand, five hundred twenty".