420540450 has 48 divisors (see below), whose sum is σ = 1137757536. Its totient is φ = 101948800.

The previous prime is 420540401. The next prime is 420540481. The reversal of 420540450 is 54045024.

It is a self number, because there is not a number n which added to its sum of digits gives 420540450.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 125787 + ... + 129086.

It is an arithmetic number, because the mean of its divisors is an integer number (23703282).

Almost surely, 2^420540450 is an apocalyptic number.

420540450 is an abundant number, since it is smaller than the sum of its proper divisors (717217086).

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

420540450 is a wasteful number, since it uses less digits than its factorization.

420540450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254899 (or 254894 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 420540450 is about 20507.0829227367. The cubic root of 420540450 is about 749.2083201737.

Adding to 420540450 its reverse (54045024), we get a palindrome (474585474).

The spelling of 420540450 in words is "four hundred twenty million, five hundred forty thousand, four hundred fifty".