406402 has 8 divisors (see below), whose sum is σ = 645516. Its totient is φ = 191232.

The previous prime is 406397. The next prime is 406403. The reversal of 406402 is 204604.

It can be written as a sum of positive squares in 2 ways, for example, as 349281 + 57121 = 591^2 + 239^2 .

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 (406403) by changing a digit.

406402 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5943 + ... + 6010.

2⁴⁰⁶⁴⁰² is an apocalyptic number.

406402 is a deficient number, since it is larger than the sum of its proper divisors (239114).

406402 is a wasteful number, since it uses less digits than its factorization.

406402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11972.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 406402 is about 637.4966666580. The cubic root of 406402 is about 74.0716374692.

It can be divided in two parts, 406 and 402, that added together give a palindrome (808).

The spelling of 406402 in words is "four hundred six thousand, four hundred two".