43402 has 4 divisors (see below), whose sum is σ = 65106. Its totient is φ = 21700.

The previous prime is 43399. The next prime is 43403. The reversal of 43402 is 20434.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 29241 + 14161 = 171^2 + 119^2 .

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (43403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10849 + ... + 10852.

2⁴³⁴⁰² is an apocalyptic number.

43402 is a deficient number, since it is larger than the sum of its proper divisors (21704).

43402 is a wasteful number, since it uses less digits than its factorization.

43402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21703.

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

The square root of 43402 is about 208.3314666583. The cubic root of 43402 is about 35.1428177986.

Adding to 43402 its reverse (20434), we get a palindrome (63836).

The spelling of 43402 in words is "forty-three thousand, four hundred two", and thus it is an iban number.