450643520 has 168 divisors, whose sum is σ = 1170578304. Its totient is φ = 165123072.

The previous prime is 450643519. The next prime is 450643547. The reversal of 450643520 is 25346054.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5429399 + ... + 5429481.

It is an arithmetic number, because the mean of its divisors is an integer number (6967728).

Almost surely, 2^450643520 is an apocalyptic number.

450643520 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 450643520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (585289152).

450643520 is an abundant number, since it is smaller than the sum of its proper divisors (719934784).

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

450643520 is a wasteful number, since it uses less digits than its factorization.

450643520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 450643520 is about 21228.3659286343. The cubic root of 450643520 is about 766.6745439224.

Adding to 450643520 its reverse (25346054), we get a palindrome (475989574).

It can be divided in two parts, 45064 and 3520, that added together give a palindrome (48584).

The spelling of 450643520 in words is "four hundred fifty million, six hundred forty-three thousand, five hundred twenty".