420820260 has 48 divisors (see below), whose sum is σ = 1346626176. Its totient is φ = 96187392.

The previous prime is 420820223. The next prime is 420820271. The reversal of 420820260 is 62028024.

It is a self number, because there is not a number n which added to its sum of digits gives 420820260.

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, 500557 + ... + 501396.

It is an arithmetic number, because the mean of its divisors is an integer number (28054712).

Almost surely, 2^420820260 is an apocalyptic number.

It is an amenable number.

420820260 is an abundant number, since it is smaller than the sum of its proper divisors (925805916).

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

420820260 is a wasteful number, since it uses less digits than its factorization.

420820260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001972 (or 1001970 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 420820260 is about 20513.9040652919. The cubic root of 420820260 is about 749.3744472790.

Adding to 420820260 its reverse (62028024), we get a palindrome (482848284).

The spelling of 420820260 in words is "four hundred twenty million, eight hundred twenty thousand, two hundred sixty".