420663530 has 24 divisors (see below), whose sum is σ = 880818948. Its totient is φ = 144227328.

The previous prime is 420663527. The next prime is 420663533. The reversal of 420663530 is 35366024.

It is an interprime number because it is at equal distance from previous prime (420663527) and next prime (420663533).

It can be written as a sum of positive squares in 2 ways, for example, as 420373009 + 290521 = 20503^2 + 539^2 .

It is a junction number, because it is equal to n+sod(n) for n = 420663493 and 420663502.

It is not an unprimeable number, because it can be changed into a prime (420663533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 428759 + ... + 429738.

Almost surely, 2^420663530 is an apocalyptic number.

420663530 is an abundant number, since it is smaller than the sum of its proper divisors (460155418).

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

420663530 is a wasteful number, since it uses less digits than its factorization.

420663530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858518 (or 858511 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 420663530 is about 20510.0836175770. The cubic root of 420663530 is about 749.2814035640.

The spelling of 420663530 in words is "four hundred twenty million, six hundred sixty-three thousand, five hundred thirty".