520773440 has 112 divisors (see below), whose sum is σ = 1361505024. Its totient is φ = 188160000.

The previous prime is 520773419. The next prime is 520773467. The reversal of 520773440 is 44377025.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 520773397 and 520773406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 693065 + ... + 693815.

Almost surely, 2^520773440 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 520773440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (680752512).

520773440 is an abundant number, since it is smaller than the sum of its proper divisors (840731584).

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

520773440 is a wasteful number, since it uses less digits than its factorization.

520773440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976 (or 966 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 32.

The square root of 520773440 is about 22820.4609944672. The cubic root of 520773440 is about 804.5436452544.

The spelling of 520773440 in words is "five hundred twenty million, seven hundred seventy-three thousand, four hundred forty".