404231420 has 24 divisors (see below), whose sum is σ = 863276400. Its totient is φ = 158951552.

The previous prime is 404231419. The next prime is 404231437. The reversal of 404231420 is 24132404.

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 = 404231392 and 404231401.

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, 170105 + ... + 172464.

It is an arithmetic number, because the mean of its divisors is an integer number (35969850).

Almost surely, 2^404231420 is an apocalyptic number.

It is an amenable number.

404231420 is an abundant number, since it is smaller than the sum of its proper divisors (459044980).

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

404231420 is a wasteful number, since it uses less digits than its factorization.

404231420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342637 (or 342635 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 404231420 is about 20105.5072057384. The cubic root of 404231420 is about 739.3953058601.

Adding to 404231420 its reverse (24132404), we get a palindrome (428363824).

The spelling of 404231420 in words is "four hundred four million, two hundred thirty-one thousand, four hundred twenty".