420632530 has 64 divisors (see below), whose sum is σ = 849955680. Its totient is φ = 149094400.

The previous prime is 420632519. The next prime is 420632551. The reversal of 420632530 is 35236024.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 8014561 + 412617969 = 2831^2 + 20313^2 .

It is a junction number, because it is equal to n+sod(n) for n = 420632495 and 420632504.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 201090 + ... + 203170.

Almost surely, 2^420632530 is an apocalyptic number.

420632530 is an abundant number, since it is smaller than the sum of its proper divisors (429323150).

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

420632530 is a wasteful number, since it uses less digits than its factorization.

420632530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2175.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 420632530 is about 20509.3278778218. The cubic root of 420632530 is about 749.2629974884.

Adding to 420632530 its reverse (35236024), we get a palindrome (455868554).

The spelling of 420632530 in words is "four hundred twenty million, six hundred thirty-two thousand, five hundred thirty".