405424120 has 16 divisors (see below), whose sum is σ = 912204360. Its totient is φ = 162169632.

The previous prime is 405424087. The next prime is 405424127. The reversal of 405424120 is 21424504.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 405424091 and 405424100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405424127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5067762 + ... + 5067841.

Almost surely, 2^405424120 is an apocalyptic number.

405424120 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

405424120 is an abundant number, since it is smaller than the sum of its proper divisors (506780240).

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

405424120 is a wasteful number, since it uses less digits than its factorization.

405424120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10135614 (or 10135610 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 405424120 is about 20135.1463863564. The cubic root of 405424120 is about 740.1217963635.

Adding to 405424120 its reverse (21424504), we get a palindrome (426848624).

The spelling of 405424120 in words is "four hundred five million, four hundred twenty-four thousand, one hundred twenty".