405500400420 has 48 divisors (see below), whose sum is σ = 1136231929728. Its totient is φ = 108054315520.

The previous prime is 405500400379. The next prime is 405500400467. The reversal of 405500400420 is 24004005504.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2389941 + ... + 2553980.

It is an arithmetic number, because the mean of its divisors is an integer number (23671498536).

Almost surely, 2^405500400420 is an apocalyptic number.

It is an amenable number.

405500400420 is an abundant number, since it is smaller than the sum of its proper divisors (730731529308).

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

405500400420 is a wasteful number, since it uses less digits than its factorization.

405500400420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4945300 (or 4945298 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

Adding to 405500400420 its reverse (24004005504), we get a palindrome (429504405924).

The spelling of 405500400420 in words is "four hundred five billion, five hundred million, four hundred thousand, four hundred twenty".