520289172 has 72 divisors (see below), whose sum is σ = 1419032160. Its totient is φ = 159785280.

The previous prime is 520289167. The next prime is 520289249. The reversal of 520289172 is 271982025.

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).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 476347 + ... + 477437.

It is an arithmetic number, because the mean of its divisors is an integer number (19708780).

Almost surely, 2^520289172 is an apocalyptic number.

520289172 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520289172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (709516080).

520289172 is an abundant number, since it is smaller than the sum of its proper divisors (898742988).

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

520289172 is a wasteful number, since it uses less digits than its factorization.

520289172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2133 (or 2128 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 520289172 is about 22809.8481362766. The cubic root of 520289172 is about 804.2941858016.

The spelling of 520289172 in words is "five hundred twenty million, two hundred eighty-nine thousand, one hundred seventy-two".