420622660 has 48 divisors (see below), whose sum is σ = 914316480. Its totient is φ = 162414720.

The previous prime is 420622639. The next prime is 420622711. The reversal of 420622660 is 66226024.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94771 + ... + 99109.

It is an arithmetic number, because the mean of its divisors is an integer number (19048260).

Almost surely, 2^420622660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420622660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (457158240).

420622660 is an abundant number, since it is smaller than the sum of its proper divisors (493693820).

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

420622660 is a wasteful number, since it uses less digits than its factorization.

420622660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4516 (or 4514 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 420622660 is about 20509.0872541905. The cubic root of 420622660 is about 749.2571370417.

Adding to 420622660 its reverse (66226024), we get a palindrome (486848684).

The spelling of 420622660 in words is "four hundred twenty million, six hundred twenty-two thousand, six hundred sixty".