420217270 has 24 divisors (see below), whose sum is σ = 831407472. Its totient is φ = 152805840.

The previous prime is 420217249. The next prime is 420217277. The reversal of 420217270 is 72712024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420217277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 172434 + ... + 174853.

It is an arithmetic number, because the mean of its divisors is an integer number (34641978).

Almost surely, 2^420217270 is an apocalyptic number.

420217270 is a deficient number, since it is larger than the sum of its proper divisors (411190202).

420217270 is a wasteful number, since it uses less digits than its factorization.

420217270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347316 (or 347305 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 420217270 is about 20499.2016917733. The cubic root of 420217270 is about 749.0163519609.

Adding to 420217270 its reverse (72712024), we get a palindrome (492929294).

The spelling of 420217270 in words is "four hundred twenty million, two hundred seventeen thousand, two hundred seventy".