420020140 has 24 divisors (see below), whose sum is σ = 882433440. Its totient is φ = 167933568.

The previous prime is 420020131. The next prime is 420020149. The reversal of 420020140 is 41020024.

It is an interprime number because it is at equal distance from previous prime (420020131) and next prime (420020149).

It is a self number, because there is not a number n which added to its sum of digits gives 420020140.

It is not an unprimeable number, because it can be changed into a prime (420020149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73921 + ... + 79399.

It is an arithmetic number, because the mean of its divisors is an integer number (36768060).

Almost surely, 2^420020140 is an apocalyptic number.

It is an amenable number.

420020140 is an abundant number, since it is smaller than the sum of its proper divisors (462413300).

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

420020140 is a wasteful number, since it uses less digits than its factorization.

420020140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9321 (or 9319 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 420020140 is about 20494.3928917155. The cubic root of 420020140 is about 748.8992088392.

Adding to 420020140 its reverse (41020024), we get a palindrome (461040164).

The spelling of 420020140 in words is "four hundred twenty million, twenty thousand, one hundred forty".