402618 has 8 divisors (see below), whose sum is σ = 805248. Its totient is φ = 134204.

The previous prime is 402613. The next prime is 402631. The reversal of 402618 is 816204.

402618 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

402618 is an admirable number.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 402594 and 402603.

It is not an unprimeable number, because it can be changed into a prime (402613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33546 + ... + 33557.

It is an arithmetic number, because the mean of its divisors is an integer number (100656).

2⁴⁰²⁶¹⁸ is an apocalyptic number.

402618 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

402618 is a wasteful number, since it uses less digits than its factorization.

402618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67108.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 402618 is about 634.5218672355. The cubic root of 402618 is about 73.8410271214.

The spelling of 402618 in words is "four hundred two thousand, six hundred eighteen".