520774408 has 128 divisors (see below), whose sum is σ = 1271473920. Its totient is φ = 194088960.

The previous prime is 520774403. The next prime is 520774517. The reversal of 520774408 is 804477025.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (520774403) 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, 1663660 + ... + 1663972.

It is an arithmetic number, because the mean of its divisors is an integer number (9933390).

Almost surely, 2^520774408 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 520774408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (635736960).

520774408 is an abundant number, since it is smaller than the sum of its proper divisors (750699512).

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

520774408 is a wasteful number, since it uses less digits than its factorization.

520774408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447 (or 443 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 37.

The square root of 520774408 is about 22820.4822034943. The cubic root of 520774408 is about 804.5441437423.

The spelling of 520774408 in words is "five hundred twenty million, seven hundred seventy-four thousand, four hundred eight".