520628436 has 18 divisors (see below), whose sum is σ = 1316033082. Its totient is φ = 173542800.

The previous prime is 520628429. The next prime is 520628441. The reversal of 520628436 is 634826025.

520628436 is a `hidden beast` number, since 5 + 20 + 628 + 4 + 3 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 511664400 + 8964036 = 22620^2 + 2994^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 14461901 = 520628436 / (5 + 2 + 0 + 6 + 2 + 8 + 4 + 3 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 520628436.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7230915 + ... + 7230986.

It is an arithmetic number, because the mean of its divisors is an integer number (73112949).

Almost surely, 2^520628436 is an apocalyptic number.

It is an amenable number.

520628436 is an abundant number, since it is smaller than the sum of its proper divisors (795404646).

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

520628436 is a wasteful number, since it uses less digits than its factorization.

520628436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14461911 (or 14461906 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 520628436 is about 22817.2837121337. The cubic root of 520628436 is about 804.4689660259.

The spelling of 520628436 in words is "five hundred twenty million, six hundred twenty-eight thousand, four hundred thirty-six".