405503000 has 128 divisors (see below), whose sum is σ = 1105902720. Its totient is φ = 136281600.

The previous prime is 405502987. The next prime is 405503011. The reversal of 405503000 is 305504.

It is a self number, because there is not a number n which added to its sum of digits gives 405503000.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 370454 + ... + 371546.

It is an arithmetic number, because the mean of its divisors is an integer number (8639865).

Almost surely, 2^405503000 is an apocalyptic number.

405503000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 405503000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (552951360).

405503000 is an abundant number, since it is smaller than the sum of its proper divisors (700399720).

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

405503000 is a wasteful number, since it uses less digits than its factorization.

405503000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1174 (or 1160 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 17.

The square root of 405503000 is about 20137.1050550967. The cubic root of 405503000 is about 740.1697930322.

Adding to 405503000 its reverse (305504), we get a palindrome (405808504).

The spelling of 405503000 in words is "four hundred five million, five hundred three thousand".