420128622 has 24 divisors (see below), whose sum is σ = 911257776. Its totient is φ = 139892256.

The previous prime is 420128617. The next prime is 420128663. The reversal of 420128622 is 226821024.

It is a happy number.

420128622 is a `hidden beast` number, since 4 + 20 + 12 + 8 + 622 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5338 + ... + 29474.

It is an arithmetic number, because the mean of its divisors is an integer number (37969074).

Almost surely, 2^420128622 is an apocalyptic number.

420128622 is an abundant number, since it is smaller than the sum of its proper divisors (491129154).

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

420128622 is a wasteful number, since it uses less digits than its factorization.

420128622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25112 (or 25109 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 420128622 is about 20497.0393471838. The cubic root of 420128622 is about 748.9636780419.

Adding to 420128622 its reverse (226821024), we get a palindrome (646949646).

It can be divided in two parts, 4201 and 28622, that added together give a palindrome (32823).

The spelling of 420128622 in words is "four hundred twenty million, one hundred twenty-eight thousand, six hundred twenty-two".