402826 has 4 divisors (see below), whose sum is σ = 604242. Its totient is φ = 201412.

The previous prime is 402823. The next prime is 402847. The reversal of 402826 is 628204.

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., 303601 + 99225 = 551^2 + 315^2 .

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 402797 and 402806.

It is not an unprimeable number, because it can be changed into a prime (402823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100705 + ... + 100708.

2⁴⁰²⁸²⁶ is an apocalyptic number.

402826 is a deficient number, since it is larger than the sum of its proper divisors (201416).

402826 is a wasteful number, since it uses less digits than its factorization.

402826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201415.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 402826 is about 634.6857490128. The cubic root of 402826 is about 73.8537408182.

The spelling of 402826 in words is "four hundred two thousand, eight hundred twenty-six".