522087840 has 72 divisors (see below), whose sum is σ = 1781629668. Its totient is φ = 139223040.

The previous prime is 522087817. The next prime is 522087847. The reversal of 522087840 is 48780225.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 514926864 + 7160976 = 22692^2 + 2676^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 522087795 and 522087804.

It is not an unprimeable number, because it can be changed into a prime (522087847) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 179841 + ... + 182720.

Almost surely, 2^522087840 is an apocalyptic number.

It is an amenable number.

522087840 is an abundant number, since it is smaller than the sum of its proper divisors (1259541828).

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

522087840 is a wasteful number, since it uses less digits than its factorization.

522087840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362582 (or 362571 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 522087840 is about 22849.2415629053. The cubic root of 522087840 is about 805.2199494140.

The spelling of 522087840 in words is "five hundred twenty-two million, eighty-seven thousand, eight hundred forty".