420318 has 24 divisors (see below), whose sum is σ = 959400. Its totient is φ = 132624.

The previous prime is 420317. The next prime is 420319. The reversal of 420318 is 813024.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (420317) and next prime (420319).

It is a super-2 number, since 2×420318² = 353334442248, which contains 22 as substring.

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

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 420318.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 420318.

It is not an unprimeable number, because it can be changed into a prime (420313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 273 + ... + 956.

It is an arithmetic number, because the mean of its divisors is an integer number (39975).

2⁴²⁰³¹⁸ is an apocalyptic number.

420318 is an abundant number, since it is smaller than the sum of its proper divisors (539082).

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

420318 is a wasteful number, since it uses less digits than its factorization.

420318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256 (or 1253 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 420318 is about 648.3193657450. The cubic root of 420318 is about 74.9076195915.

The spelling of 420318 in words is "four hundred twenty thousand, three hundred eighteen".