420323140 has 24 divisors (see below), whose sum is σ = 887167512. Its totient is φ = 167274240.

The previous prime is 420323131. The next prime is 420323143. The reversal of 420323140 is 41323024.

It can be written as a sum of positive squares in 4 ways, for example, as 39917124 + 380406016 = 6318^2 + 19504^2 .

It is not an unprimeable number, because it can be changed into a prime (420323143) 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, 49401 + ... + 57280.

It is an arithmetic number, because the mean of its divisors is an integer number (36965313).

Almost surely, 2^420323140 is an apocalyptic number.

It is an amenable number.

420323140 is an abundant number, since it is smaller than the sum of its proper divisors (466844372).

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

420323140 is a wasteful number, since it uses less digits than its factorization.

420323140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106887 (or 106885 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 420323140 is about 20501.7838248285. The cubic root of 420323140 is about 749.0792493461.

Adding to 420323140 its reverse (41323024), we get a palindrome (461646164).

The spelling of 420323140 in words is "four hundred twenty million, three hundred twenty-three thousand, one hundred forty".