420531900 has 72 divisors (see below), whose sum is σ = 1258721520. Its totient is φ = 108272640.

The previous prime is 420531869. The next prime is 420531901. The reversal of 420531900 is 9135024.

It is a super-2 number, since 2×420531900² = 353694157835220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420531901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15469 + ... + 32868.

Almost surely, 2^420531900 is an apocalyptic number.

It is an amenable number.

420531900 is an abundant number, since it is smaller than the sum of its proper divisors (838189620).

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

420531900 is a wasteful number, since it uses less digits than its factorization.

420531900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48383 (or 48376 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 420531900 is about 20506.8744571180. The cubic root of 420531900 is about 749.2032427592.

Adding to 420531900 its reverse (9135024), we get a palindrome (429666924).

The spelling of 420531900 in words is "four hundred twenty million, five hundred thirty-one thousand, nine hundred".