8402 has 4 divisors (see below), whose sum is σ = 12606.
Its totient is φ = 4200.
The previous prime is 8389. The next prime is 8419. The reversal of 8402 is 2048.
Subtracting from 8402 its product of nonzero digits (64), we obtain a palindrome (8338).
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., 8281 + 121 = 91^2 + 11^2
It is a nialpdrome in base 7.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (5) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2099 + ... + 2102.
28402 is an apocalyptic number.
8402 is a deficient number, since it is larger than the sum of its proper divisors (4204).
8402 is a wasteful number, since it uses less digits than its factorization.
8402 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 4203.
The product of its (nonzero) digits is 64, while the sum is 14.
The square root of 8402 is about 91.6624241442.
The cubic root of 8402 is about 20.3295403358.
The spelling of 8402 in words is "eight thousand, four hundred two".