420040260 has 144 divisors (see below), whose sum is σ = 1349187840. Its totient is φ = 105557760.

The previous prime is 420040241. The next prime is 420040261. The reversal of 420040260 is 62040024.

420040260 is a `hidden beast` number, since 4 + 200 + 402 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (420040261) 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 47 ways as a sum of consecutive naturals, for example, 293226 + ... + 294654.

It is an arithmetic number, because the mean of its divisors is an integer number (9369360).

Almost surely, 2^420040260 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 420040260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (674593920).

420040260 is an abundant number, since it is smaller than the sum of its proper divisors (929147580).

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

420040260 is a wasteful number, since it uses less digits than its factorization.

420040260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538 (or 1533 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 420040260 is about 20494.8837518050. The cubic root of 420040260 is about 748.9111666877.

Adding to 420040260 its reverse (62040024), we get a palindrome (482080284).

The spelling of 420040260 in words is "four hundred twenty million, forty thousand, two hundred sixty".