420434140 has 96 divisors (see below), whose sum is σ = 1074294144. Its totient is φ = 134922240.

The previous prime is 420434111. The next prime is 420434173. The reversal of 420434140 is 41434024.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 573214 + ... + 573946.

It is an arithmetic number, because the mean of its divisors is an integer number (11190564).

Almost surely, 2^420434140 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 420434140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (537147072).

420434140 is an abundant number, since it is smaller than the sum of its proper divisors (653860004).

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

420434140 is a wasteful number, since it uses less digits than its factorization.

420434140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007 (or 1005 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 420434140 is about 20504.4907276431. The cubic root of 420434140 is about 749.1451831247.

Adding to 420434140 its reverse (41434024), we get a palindrome (461868164).

The spelling of 420434140 in words is "four hundred twenty million, four hundred thirty-four thousand, one hundred forty".