47721560 has 64 divisors (see below), whose sum is σ = 111088800. Its totient is φ = 18441216.

The previous prime is 47721523. The next prime is 47721589. The reversal of 47721560 is 6512774.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 172142 + ... + 172418.

Almost surely, 2^47721560 is an apocalyptic number.

47721560 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 47721560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55544400).

47721560 is an abundant number, since it is smaller than the sum of its proper divisors (63367240).

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

47721560 is a wasteful number, since it uses less digits than its factorization.

47721560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420 (or 416 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 47721560 is about 6908.0793278595. The cubic root of 47721560 is about 362.7200344678.

The spelling of 47721560 in words is "forty-seven million, seven hundred twenty-one thousand, five hundred sixty".