22402 has 8 divisors (see below), whose sum is σ = 35136. Its totient is φ = 10692.

The previous prime is 22397. The next prime is 22409. The reversal of 22402 is 20422.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (22409) by changing a digit.

22402 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 in 3 ways as a sum of consecutive naturals, for example, 198 + ... + 289.

It is an arithmetic number, because the mean of its divisors is an integer number (4392).

2²²⁴⁰² is an apocalyptic number.

22402 is a deficient number, since it is larger than the sum of its proper divisors (12734).

22402 is a wasteful number, since it uses less digits than its factorization.

22402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512.

The product of its (nonzero) digits is 32, while the sum is 10.

The square root of 22402 is about 149.6729768529. The cubic root of 22402 is about 28.1900338674.

Adding to 22402 its reverse (20422), we get a palindrome (42824).

It can be divided in two parts, 22 and 402, that added together give a palindrome (424).

The spelling of 22402 in words is "twenty-two thousand, four hundred two", and thus it is an iban number.