420503540 has 24 divisors (see below), whose sum is σ = 886923240. Its totient is φ = 167465088.

The previous prime is 420503539. The next prime is 420503609. The reversal of 420503540 is 45305024.

It can be written as a sum of positive squares in 4 ways, for example, as 285339664 + 135163876 = 16892^2 + 11626^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41327 + ... + 50486.

It is an arithmetic number, because the mean of its divisors is an integer number (36955135).

Almost surely, 2^420503540 is an apocalyptic number.

It is an amenable number.

420503540 is an abundant number, since it is smaller than the sum of its proper divisors (466419700).

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

420503540 is a wasteful number, since it uses less digits than its factorization.

420503540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92051 (or 92049 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 420503540 is about 20506.1829700215. The cubic root of 420503540 is about 749.1864006903.

Adding to 420503540 its reverse (45305024), we get a palindrome (465808564).

The spelling of 420503540 in words is "four hundred twenty million, five hundred three thousand, five hundred forty".