47731680 has 240 divisors, whose sum is σ = 175633920. Its totient is φ = 12192768.

The previous prime is 47731643. The next prime is 47731687. The reversal of 47731680 is 8613774.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47731687) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 375777 + ... + 375903.

It is an arithmetic number, because the mean of its divisors is an integer number (731808).

Almost surely, 2^47731680 is an apocalyptic number.

47731680 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 47731680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87816960).

47731680 is an abundant number, since it is smaller than the sum of its proper divisors (127902240).

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

47731680 is a wasteful number, since it uses less digits than its factorization.

47731680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 47731680 is about 6908.8117646959. The cubic root of 47731680 is about 362.7456725463.

The spelling of 47731680 in words is "forty-seven million, seven hundred thirty-one thousand, six hundred eighty".