520200450 has 144 divisors (see below), whose sum is σ = 1742584896. Its totient is φ = 108086400.

The previous prime is 520200437. The next prime is 520200451. The reversal of 520200450 is 54002025.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (520200451) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 27144 + ... + 42156.

It is an arithmetic number, because the mean of its divisors is an integer number (12101284).

Almost surely, 2^520200450 is an apocalyptic number.

520200450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 520200450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (871292448).

520200450 is an abundant number, since it is smaller than the sum of its proper divisors (1222384446).

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

520200450 is a wasteful number, since it uses less digits than its factorization.

520200450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15049 (or 15041 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 520200450 is about 22807.9032355015. The cubic root of 520200450 is about 804.2484659410.

Adding to 520200450 its reverse (54002025), we get a palindrome (574202475).

It can be divided in two parts, 520200 and 450, that multiplied together give a square (234090000 = 15300²).

The spelling of 520200450 in words is "five hundred twenty million, two hundred thousand, four hundred fifty".