520301664 has 48 divisors (see below), whose sum is σ = 1517549040. Its totient is φ = 173433600.

The previous prime is 520301651. The next prime is 520301669. The reversal of 520301664 is 466103025.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×520301664² = 541427643122337792, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520301669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 300237 + ... + 301964.

It is an arithmetic number, because the mean of its divisors is an integer number (31615605).

Almost surely, 2^520301664 is an apocalyptic number.

520301664 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

520301664 is an abundant number, since it is smaller than the sum of its proper divisors (997247376).

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

520301664 is a wasteful number, since it uses less digits than its factorization.

520301664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602220 (or 602206 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 520301664 is about 22810.1219637248. The cubic root of 520301664 is about 804.3006227108.

Adding to 520301664 its reverse (466103025), we get a palindrome (986404689).

The spelling of 520301664 in words is "five hundred twenty million, three hundred one thousand, six hundred sixty-four".