402426 has 24 divisors (see below), whose sum is σ = 886080. Its totient is φ = 131976.

The previous prime is 402419. The next prime is 402443. The reversal of 402426 is 624204.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 402399 and 402408.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1281 + ... + 1563.

It is an arithmetic number, because the mean of its divisors is an integer number (36920).

2⁴⁰²⁴²⁶ is an apocalyptic number.

402426 is an abundant number, since it is smaller than the sum of its proper divisors (483654).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

402426 is a wasteful number, since it uses less digits than its factorization.

402426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 402426 is about 634.3705541716. The cubic root of 402426 is about 73.8292875142.

It can be divided in two parts, 402 and 426, that added together give a palindrome (828).

The spelling of 402426 in words is "four hundred two thousand, four hundred twenty-six".