82402 has 4 divisors (see below), whose sum is σ = 123606. Its totient is φ = 41200.

The previous prime is 82393. The next prime is 82421. The reversal of 82402 is 20428.

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., 57121 + 25281 = 239^2 + 159^2 .

It is a congruent number.

It is an unprimeable number.

82402 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 20599 + ... + 20602.

2⁸²⁴⁰² is an apocalyptic number.

82402 is a deficient number, since it is larger than the sum of its proper divisors (41204).

82402 is a wasteful number, since it uses less digits than its factorization.

82402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41203.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 82402 is about 287.0574855321. The cubic root of 82402 is about 43.5156943414.

It can be divided in two parts, 82 and 402, that added together give a palindrome (484).

The spelling of 82402 in words is "eighty-two thousand, four hundred two".