450405520 has 20 divisors (see below), whose sum is σ = 1047193020. Its totient is φ = 180162176.

The previous prime is 450405509. The next prime is 450405539. The reversal of 450405520 is 25504054.

It can be written as a sum of positive squares in 2 ways, for example, as 299705344 + 150700176 = 17312^2 + 12276^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2814955 + ... + 2815114.

It is an arithmetic number, because the mean of its divisors is an integer number (52359651).

Almost surely, 2^450405520 is an apocalyptic number.

450405520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

450405520 is an abundant number, since it is smaller than the sum of its proper divisors (596787500).

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

450405520 is a wasteful number, since it uses less digits than its factorization.

450405520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5630082 (or 5630076 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 450405520 is about 21222.7594812739. The cubic root of 450405520 is about 766.5395512838.

Adding to 450405520 its reverse (25504054), we get a palindrome (475909574).

The spelling of 450405520 in words is "four hundred fifty million, four hundred five thousand, five hundred twenty".