420555630 has 32 divisors (see below), whose sum is σ = 1101091968. Its totient is φ = 101952800.

The previous prime is 420555623. The next prime is 420555637. The reversal of 420555630 is 36555024.

It is an interprime number because it is at equal distance from previous prime (420555623) and next prime (420555637).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420555637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 636876 + ... + 637535.

It is an arithmetic number, because the mean of its divisors is an integer number (34409124).

Almost surely, 2^420555630 is an apocalyptic number.

420555630 is an abundant number, since it is smaller than the sum of its proper divisors (680536338).

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

420555630 is a wasteful number, since it uses less digits than its factorization.

420555630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274432.

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 420555630 is about 20507.4530354210. The cubic root of 420555630 is about 749.2173346418.

The spelling of 420555630 in words is "four hundred twenty million, five hundred fifty-five thousand, six hundred thirty".