405143420 has 96 divisors (see below), whose sum is σ = 960664320. Its totient is φ = 142248960.

The previous prime is 405143407. The next prime is 405143423. The reversal of 405143420 is 24341504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405143423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1068791 + ... + 1069169.

It is an arithmetic number, because the mean of its divisors is an integer number (10006920).

Almost surely, 2^405143420 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 405143420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (480332160).

405143420 is an abundant number, since it is smaller than the sum of its proper divisors (555520900).

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

405143420 is a wasteful number, since it uses less digits than its factorization.

405143420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555 (or 553 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 405143420 is about 20128.1747806402. The cubic root of 405143420 is about 739.9509463466.

Adding to 405143420 its reverse (24341504), we get a palindrome (429484924).

It can be divided in two parts, 40514 and 3420, that added together give a palindrome (43934).

The spelling of 405143420 in words is "four hundred five million, one hundred forty-three thousand, four hundred twenty".