420420140 has 96 divisors (see below), whose sum is σ = 1056620544. Its totient is φ = 137479680.

The previous prime is 420420137. The next prime is 420420157. The reversal of 420420140 is 41024024.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 316157 + ... + 317483.

It is an arithmetic number, because the mean of its divisors is an integer number (11006464).

Almost surely, 2^420420140 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 420420140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (528310272).

420420140 is an abundant number, since it is smaller than the sum of its proper divisors (636200404).

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

420420140 is a wasteful number, since it uses less digits than its factorization.

420420140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1447 (or 1445 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 420420140 is about 20504.1493361710. The cubic root of 420420140 is about 749.1368677922.

Adding to 420420140 its reverse (41024024), we get a palindrome (461444164).

The spelling of 420420140 in words is "four hundred twenty million, four hundred twenty thousand, one hundred forty".