520745400 has 288 divisors, whose sum is σ = 2054526240. Its totient is φ = 115706880.

The previous prime is 520745399. The next prime is 520745509. The reversal of 520745400 is 4547025.

520745400 is a `hidden beast` number, since 5 + 207 + 454 + 0 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 465642 + ... + 466758.

Almost surely, 2^520745400 is an apocalyptic number.

520745400 is a gapful number since it is divisible by the number (50) 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 520745400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1027263120).

520745400 is an abundant number, since it is smaller than the sum of its proper divisors (1533780840).

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

520745400 is a wasteful number, since it uses less digits than its factorization.

520745400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183 (or 1171 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 520745400 is about 22819.8466252515. The cubic root of 520745400 is about 804.5292053163.

The spelling of 520745400 in words is "five hundred twenty million, seven hundred forty-five thousand, four hundred".