520784778 has 16 divisors (see below), whose sum is σ = 1051126560. Its totient is φ = 172002096.

The previous prime is 520784777. The next prime is 520784801. The reversal of 520784778 is 877487025.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (520784777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 397500 + ... + 398807.

It is an arithmetic number, because the mean of its divisors is an integer number (65695410).

Almost surely, 2^520784778 is an apocalyptic number.

520784778 is an abundant number, since it is smaller than the sum of its proper divisors (530341782).

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

520784778 is a wasteful number, since it uses less digits than its factorization.

520784778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796421.

The product of its (nonzero) digits is 878080, while the sum is 48.

The square root of 520784778 is about 22820.7094105332. The cubic root of 520784778 is about 804.5494839096.

The spelling of 520784778 in words is "five hundred twenty million, seven hundred eighty-four thousand, seven hundred seventy-eight".