405020043120 has 160 divisors (see below), whose sum is σ = 1565376238080. Its totient is φ = 84160005120.

The previous prime is 405020043059. The next prime is 405020043121. The reversal of 405020043120 is 21340020504.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405020043121) 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, 10939855 + ... + 10976814.

It is an arithmetic number, because the mean of its divisors is an integer number (9783601488).

Almost surely, 2^405020043120 is an apocalyptic number.

405020043120 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

405020043120 is an abundant number, since it is smaller than the sum of its proper divisors (1160356194960).

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

405020043120 is a wasteful number, since it uses less digits than its factorization.

405020043120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21916703 (or 21916697 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

Adding to 405020043120 its reverse (21340020504), we get a palindrome (426360063624).

The spelling of 405020043120 in words is "four hundred five billion, twenty million, forty-three thousand, one hundred twenty".