520705374 has 64 divisors (see below), whose sum is σ = 1271654400. Its totient is φ = 138824928.

The previous prime is 520705369. The next prime is 520705379. The reversal of 520705374 is 473507025.

It is an interprime number because it is at equal distance from previous prime (520705369) and next prime (520705379).

It is a super-2 number, since 2×520705374² = 542268173024959752, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520705379) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48597 + ... + 58335.

It is an arithmetic number, because the mean of its divisors is an integer number (19869600).

Almost surely, 2^520705374 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520705374, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (635827200).

520705374 is an abundant number, since it is smaller than the sum of its proper divisors (750949026).

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

520705374 is a wasteful number, since it uses less digits than its factorization.

520705374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9837.

The product of its (nonzero) digits is 29400, while the sum is 33.

The square root of 520705374 is about 22818.9696086392. The cubic root of 520705374 is about 804.5085919730.

The spelling of 520705374 in words is "five hundred twenty million, seven hundred five thousand, three hundred seventy-four".