405522500 has 30 divisors (see below), whose sum is σ = 886802070. Its totient is φ = 162208000.

The previous prime is 405522497. The next prime is 405522521. The reversal of 405522500 is 5225504.

405522500 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 5 ways, for example, as 61716736 + 343805764 = 7856^2 + 18542^2 .

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 78605 + ... + 83604.

It is an arithmetic number, because the mean of its divisors is an integer number (29560069).

Almost surely, 2^405522500 is an apocalyptic number.

It is an amenable number.

405522500 is an abundant number, since it is smaller than the sum of its proper divisors (481279570).

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

405522500 is a wasteful number, since it uses less digits than its factorization.

405522500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162233 (or 162216 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 23.

The square root of 405522500 is about 20137.5892300941. The cubic root of 405522500 is about 740.1816573748.

The spelling of 405522500 in words is "four hundred five million, five hundred twenty-two thousand, five hundred".