521683980 has 24 divisors (see below), whose sum is σ = 1460715312. Its totient is φ = 139115712.

The previous prime is 521683961. The next prime is 521683993. The reversal of 521683980 is 89386125.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4347307 + ... + 4347426.

It is an arithmetic number, because the mean of its divisors is an integer number (60863138).

Almost surely, 2^521683980 is an apocalyptic number.

It is an amenable number.

521683980 is an abundant number, since it is smaller than the sum of its proper divisors (939031332).

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

521683980 is a wasteful number, since it uses less digits than its factorization.

521683980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8694745 (or 8694743 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 521683980 is about 22840.4023607291. The cubic root of 521683980 is about 805.0122704301.

The spelling of 521683980 in words is "five hundred twenty-one million, six hundred eighty-three thousand, nine hundred eighty".