47740 has 48 divisors (see below), whose sum is σ = 129024. Its totient is φ = 14400.

The previous prime is 47737. The next prime is 47741. The reversal of 47740 is 4774.

47740 = T₁₀ + T₁₁ + ... + T₆₅.

It is a happy number.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47741) 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, 1525 + ... + 1555.

It is an arithmetic number, because the mean of its divisors is an integer number (2688).

2⁴⁷⁷⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64512).

47740 is an abundant number, since it is smaller than the sum of its proper divisors (81284).

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

47740 is a wasteful number, since it uses less digits than its factorization.

47740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58 (or 56 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 22.

The square root of 47740 is about 218.4948511979. The cubic root of 47740 is about 36.2766747778.

It can be divided in two parts, 47 and 740, that added together give a palindrome (787).

The spelling of 47740 in words is "forty-seven thousand, seven hundred forty", and thus it is an iban number.