420534540 has 72 divisors (see below), whose sum is σ = 1306757088. Its totient is φ = 109405440.

The previous prime is 420534533. The next prime is 420534577. The reversal of 420534540 is 45435024.

420534540 is a `hidden beast` number, since 4 + 205 + 3 + 454 + 0 = 666.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 21112 + ... + 35871.

It is an arithmetic number, because the mean of its divisors is an integer number (18149404).

Almost surely, 2^420534540 is an apocalyptic number.

It is an amenable number.

420534540 is an abundant number, since it is smaller than the sum of its proper divisors (886222548).

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

420534540 is a wasteful number, since it uses less digits than its factorization.

420534540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57039 (or 57034 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 420534540 is about 20506.9388256756. The cubic root of 420534540 is about 749.2048105296.

Adding to 420534540 its reverse (45435024), we get a palindrome (465969564).

The spelling of 420534540 in words is "four hundred twenty million, five hundred thirty-four thousand, five hundred forty".