520660100 has 36 divisors (see below), whose sum is σ = 1132404084. Its totient is φ = 207790080.

The previous prime is 520660099. The next prime is 520660109. The reversal of 520660100 is 1066025.

It can be written as a sum of positive squares in 6 ways, for example, as 18541636 + 502118464 = 4306^2 + 22408^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520660109) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 40004 + ... + 51396.

It is an arithmetic number, because the mean of its divisors is an integer number (31455669).

Almost surely, 2^520660100 is an apocalyptic number.

520660100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

520660100 is an abundant number, since it is smaller than the sum of its proper divisors (611743984).

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

520660100 is a wasteful number, since it uses less digits than its factorization.

520660100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11864 (or 11857 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 520660100 is about 22817.9775615632. The cubic root of 520660100 is about 804.4852746427.

The spelling of 520660100 in words is "five hundred twenty million, six hundred sixty thousand, one hundred".