523421040 has 40 divisors (see below), whose sum is σ = 1622605968. Its totient is φ = 139578880.

The previous prime is 523421033. The next prime is 523421083. The reversal of 523421040 is 40124325.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×523421040² = 547939170229363200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 523420998 and 523421016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1090221 + ... + 1090700.

Almost surely, 2^523421040 is an apocalyptic number.

It is an amenable number.

523421040 is an abundant number, since it is smaller than the sum of its proper divisors (1099184928).

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

523421040 is a wasteful number, since it uses less digits than its factorization.

523421040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2180937 (or 2180931 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 523421040 is about 22878.3967969786. The cubic root of 523421040 is about 805.9047682455.

Adding to 523421040 its reverse (40124325), we get a palindrome (563545365).

The spelling of 523421040 in words is "five hundred twenty-three million, four hundred twenty-one thousand, forty".