420613660 has 48 divisors (see below), whose sum is σ = 937639584. Its totient is φ = 157943808.

The previous prime is 420613657. The next prime is 420613679. The reversal of 420613660 is 66316024.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 154027 + ... + 156733.

It is an arithmetic number, because the mean of its divisors is an integer number (19534158).

Almost surely, 2^420613660 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 420613660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (468819792).

420613660 is an abundant number, since it is smaller than the sum of its proper divisors (517025924).

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

420613660 is a wasteful number, since it uses less digits than its factorization.

420613660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3190 (or 3188 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 420613660 is about 20508.8678380841. The cubic root of 420613660 is about 749.2517930894.

Adding to 420613660 its reverse (66316024), we get a palindrome (486929684).

The spelling of 420613660 in words is "four hundred twenty million, six hundred thirteen thousand, six hundred sixty".