43420 has 24 divisors (see below), whose sum is σ = 98784. Its totient is φ = 15936.

The previous prime is 43411. The next prime is 43427. The reversal of 43420 is 2434.

43420 = T₇₉ + T₈₀ + ... + T₉₀.

43420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 43420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177 + ... + 343.

It is an arithmetic number, because the mean of its divisors is an integer number (4116).

2⁴³⁴²⁰ 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 43420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49392).

43420 is an abundant number, since it is smaller than the sum of its proper divisors (55364).

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

43420 is a wasteful number, since it uses less digits than its factorization.

43420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 43420 is about 208.3746625672. The cubic root of 43420 is about 35.1476753574.

Adding to 43420 its reverse (2434), we get a palindrome (45854).

It can be divided in two parts, 434 and 20, that added together give a palindrome (454).

The spelling of 43420 in words is "forty-three thousand, four hundred twenty", and thus it is an iban number.