420234540 has 48 divisors (see below), whose sum is σ = 1283627520. Its totient is φ = 101874880.

The previous prime is 420234539. The next prime is 420234547. The reversal of 420234540 is 45432024.

It is a self number, because there is not a number n which added to its sum of digits gives 420234540.

It is not an unprimeable number, because it can be changed into a prime (420234547) 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 15 ways as a sum of consecutive naturals, for example, 317700 + ... + 319019.

It is an arithmetic number, because the mean of its divisors is an integer number (26742240).

Almost surely, 2^420234540 is an apocalyptic number.

It is an amenable number.

420234540 is an abundant number, since it is smaller than the sum of its proper divisors (863392980).

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

420234540 is a wasteful number, since it uses less digits than its factorization.

420234540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636742 (or 636740 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 420234540 is about 20499.6229233613. The cubic root of 420234540 is about 749.0266127919.

Adding to 420234540 its reverse (45432024), we get a palindrome (465666564).

The spelling of 420234540 in words is "four hundred twenty million, two hundred thirty-four thousand, five hundred forty".