520404102 has 80 divisors (see below), whose sum is σ = 1241512272. Its totient is φ = 162362880.

The previous prime is 520404089. The next prime is 520404133. The reversal of 520404102 is 201404025.

520404102 is a `hidden beast` number, since 520 + 40 + 4 + 102 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 641277 + ... + 642087.

Almost surely, 2^520404102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520404102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (620756136).

520404102 is an abundant number, since it is smaller than the sum of its proper divisors (721108170).

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

520404102 is a wasteful number, since it uses less digits than its factorization.

520404102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075 (or 1066 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 520404102 is about 22812.3673037237. The cubic root of 520404102 is about 804.3534033356.

Adding to 520404102 its reverse (201404025), we get a palindrome (721808127).

The spelling of 520404102 in words is "five hundred twenty million, four hundred four thousand, one hundred two".