423511020 has 72 divisors (see below), whose sum is σ = 1303861104. Its totient is φ = 111247488.

The previous prime is 423511013. The next prime is 423511037. The reversal of 423511020 is 20115324.

It is a super-2 number, since 2×423511020² = 358723168122880800, which contains 22 as substring.

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 = 423510984 and 423511002.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5499 + ... + 29618.

It is an arithmetic number, because the mean of its divisors is an integer number (18109182).

Almost surely, 2^423511020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423511020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (651930552).

423511020 is an abundant number, since it is smaller than the sum of its proper divisors (880350084).

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

423511020 is a wasteful number, since it uses less digits than its factorization.

423511020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35199 (or 35194 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 423511020 is about 20579.3833726864. The cubic root of 423511020 is about 750.9682428033.

Adding to 423511020 its reverse (20115324), we get a palindrome (443626344).

The spelling of 423511020 in words is "four hundred twenty-three million, five hundred eleven thousand, twenty".