402306 has 16 divisors (see below), whose sum is σ = 847200. Its totient is φ = 127008.

The previous prime is 402299. The next prime is 402307. The reversal of 402306 is 603204.

It is a Curzon number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (402307) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1651 + ... + 1878.

It is an arithmetic number, because the mean of its divisors is an integer number (52950).

2⁴⁰²³⁰⁶ is an apocalyptic number.

402306 is an abundant number, since it is smaller than the sum of its proper divisors (444894).

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

402306 is a wasteful number, since it uses less digits than its factorization.

402306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3553.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 402306 is about 634.2759651760. The cubic root of 402306 is about 73.8219483635.

It can be divided in two parts, 40 and 2306, that added together give a triangular number (2346 = T₆₈).

The spelling of 402306 in words is "four hundred two thousand, three hundred six".