47721432 has 48 divisors (see below), whose sum is σ = 131143320. Its totient is φ = 14460160.

The previous prime is 47721413. The next prime is 47721433. The reversal of 47721432 is 23412774.

47721432 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 47721432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47721433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5313 + ... + 11120.

Almost surely, 2^47721432 is an apocalyptic number.

It is an amenable number.

47721432 is an abundant number, since it is smaller than the sum of its proper divisors (83421888).

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

47721432 is a wasteful number, since it uses less digits than its factorization.

47721432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16464 (or 16449 counting only the distinct ones).

The product of its digits is 9408, while the sum is 30.

The square root of 47721432 is about 6908.0700633390. The cubic root of 47721432 is about 362.7197101685.

The spelling of 47721432 in words is "forty-seven million, seven hundred twenty-one thousand, four hundred thirty-two".