418243420 has 36 divisors (see below), whose sum is σ = 1021711320. Its totient is φ = 143397408.

The previous prime is 418243417. The next prime is 418243421. The reversal of 418243420 is 24342814.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (418243421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 212410 + ... + 214369.

It is an arithmetic number, because the mean of its divisors is an integer number (28380870).

Almost surely, 2^418243420 is an apocalyptic number.

It is an amenable number.

418243420 is an abundant number, since it is smaller than the sum of its proper divisors (603467900).

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

418243420 is a wasteful number, since it uses less digits than its factorization.

418243420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426802 (or 426793 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 418243420 is about 20451.0004645250. Note that the first 3 decimals coincide. The cubic root of 418243420 is about 747.8417478134.

The spelling of 418243420 in words is "four hundred eighteen million, two hundred forty-three thousand, four hundred twenty".