424404020 has 24 divisors (see below), whose sum is σ = 900076968. Its totient is φ = 168080000.

The previous prime is 424404017. The next prime is 424404041. The reversal of 424404020 is 20404424.

It can be written as a sum of positive squares in 4 ways, for example, as 61653904 + 362750116 = 7852^2 + 19046^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 424403983 and 424404001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103031 + ... + 107070.

It is an arithmetic number, because the mean of its divisors is an integer number (37503207).

Almost surely, 2^424404020 is an apocalyptic number.

It is an amenable number.

424404020 is an abundant number, since it is smaller than the sum of its proper divisors (475672948).

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

424404020 is a wasteful number, since it uses less digits than its factorization.

424404020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210211 (or 210209 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 424404020 is about 20601.0684188952. The cubic root of 424404020 is about 751.4956937360.

Adding to 424404020 its reverse (20404424), we get a palindrome (444808444).

The spelling of 424404020 in words is "four hundred twenty-four million, four hundred four thousand, twenty".