520402344 has 160 divisors (see below), whose sum is σ = 1657743840. Its totient is φ = 135004800.

The previous prime is 520402339. The next prime is 520402357. The reversal of 520402344 is 443204025.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 633454 + ... + 634274.

It is an arithmetic number, because the mean of its divisors is an integer number (10360899).

Almost surely, 2^520402344 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 520402344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (828871920).

520402344 is an abundant number, since it is smaller than the sum of its proper divisors (1137341496).

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

520402344 is a wasteful number, since it uses less digits than its factorization.

520402344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869 (or 844 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 520402344 is about 22812.3287719601. The cubic root of 520402344 is about 804.3524975940.

Adding to 520402344 its reverse (443204025), we get a palindrome (963606369).

The spelling of 520402344 in words is "five hundred twenty million, four hundred two thousand, three hundred forty-four".