420423030 has 72 divisors (see below), whose sum is σ = 1114783488. Its totient is φ = 109931328.

The previous prime is 420423007. The next prime is 420423077. The reversal of 420423030 is 30324024.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 420422994 and 420423012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 251979 + ... + 253641.

It is an arithmetic number, because the mean of its divisors is an integer number (15483104).

Almost surely, 2^420423030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420423030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (557391744).

420423030 is an abundant number, since it is smaller than the sum of its proper divisors (694360458).

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

420423030 is a wasteful number, since it uses less digits than its factorization.

420423030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1782 (or 1726 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 420423030 is about 20504.2198095904. The cubic root of 420423030 is about 749.1385843295.

Adding to 420423030 its reverse (30324024), we get a palindrome (450747054).

The spelling of 420423030 in words is "four hundred twenty million, four hundred twenty-three thousand, thirty".