420440343 has 32 divisors (see below), whose sum is σ = 582702336. Its totient is φ = 269541888.

The previous prime is 420440329. The next prime is 420440357. The reversal of 420440343 is 343044024.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (420440329) and next prime (420440357).

It is not a de Polignac number, because 420440343 - 2⁴ = 420440327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420440393) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2430205 + ... + 2430377.

It is an arithmetic number, because the mean of its divisors is an integer number (18209448).

Almost surely, 2^420440343 is an apocalyptic number.

420440343 is a deficient number, since it is larger than the sum of its proper divisors (162261993).

420440343 is a wasteful number, since it uses less digits than its factorization.

420440343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463.

The product of its (nonzero) digits is 4608, while the sum is 24.

The square root of 420440343 is about 20504.6419866332. The cubic root of 420440343 is about 749.1488673519.

Adding to 420440343 its reverse (343044024), we get a palindrome (763484367).

The spelling of 420440343 in words is "four hundred twenty million, four hundred forty thousand, three hundred forty-three".