405520434040 has 64 divisors (see below), whose sum is σ = 916101583200. Its totient is φ = 161555046912.

The previous prime is 405520434001. The next prime is 405520434089. The reversal of 405520434040 is 40434025504.

It is a junction number, because it is equal to n+sod(n) for n = 405520433993 and 405520434011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11094034 + ... + 11130526.

Almost surely, 2^405520434040 is an apocalyptic number.

405520434040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

405520434040 is an abundant number, since it is smaller than the sum of its proper divisors (510581149160).

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

405520434040 is a wasteful number, since it uses less digits than its factorization.

405520434040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37616 (or 37612 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 31.

Adding to 405520434040 its reverse (40434025504), we get a palindrome (445954459544).

The spelling of 405520434040 in words is "four hundred five billion, five hundred twenty million, four hundred thirty-four thousand, forty".