513706620 has 96 divisors (see below), whose sum is σ = 1670893056. Its totient is φ = 115488000.

The previous prime is 513706619. The next prime is 513706637. The reversal of 513706620 is 26607315.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15595 + ... + 35645.

It is an arithmetic number, because the mean of its divisors is an integer number (17405136).

Almost surely, 2^513706620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 513706620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (835446528).

513706620 is an abundant number, since it is smaller than the sum of its proper divisors (1157186436).

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

513706620 is a wasteful number, since it uses less digits than its factorization.

513706620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20131 (or 20129 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 513706620 is about 22665.0969554511. The cubic root of 513706620 is about 800.8878788078.

The spelling of 513706620 in words is "five hundred thirteen million, seven hundred six thousand, six hundred twenty".