404542500 has 60 divisors (see below), whose sum is σ = 1179559920. Its totient is φ = 107876000.

The previous prime is 404542483. The next prime is 404542507. The reversal of 404542500 is 5245404.

It is a tau number, because it is divible by the number of its divisors (60).

It is not an unprimeable number, because it can be changed into a prime (404542507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 19470 + ... + 34469.

It is an arithmetic number, because the mean of its divisors is an integer number (19659332).

Almost surely, 2^404542500 is an apocalyptic number.

It is an amenable number.

404542500 is an abundant number, since it is smaller than the sum of its proper divisors (775017420).

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

404542500 is a wasteful number, since it uses less digits than its factorization.

404542500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53966 (or 53949 counting only the distinct ones).

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

The square root of 404542500 is about 20113.2419067638. The cubic root of 404542500 is about 739.5849267086.

Adding to 404542500 its reverse (5245404), we get a palindrome (409787904).

The spelling of 404542500 in words is "four hundred four million, five hundred forty-two thousand, five hundred".