47643720 has 64 divisors (see below), whose sum is σ = 144383040. Its totient is φ = 12576000.

The previous prime is 47643719. The next prime is 47643751. The reversal of 47643720 is 2734674.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10155 + ... + 14085.

It is an arithmetic number, because the mean of its divisors is an integer number (2255985).

Almost surely, 2^47643720 is an apocalyptic number.

47643720 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 47643720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72191520).

47643720 is an abundant number, since it is smaller than the sum of its proper divisors (96739320).

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

47643720 is a wasteful number, since it uses less digits than its factorization.

47643720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4046 (or 4042 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 33.

The square root of 47643720 is about 6902.4430457629. The cubic root of 47643720 is about 362.5227128060.

The spelling of 47643720 in words is "forty-seven million, six hundred forty-three thousand, seven hundred twenty".