523506420 has 36 divisors (see below), whose sum is σ = 1587970020. Its totient is φ = 139601664.

The previous prime is 523506419. The next prime is 523506439. The reversal of 523506420 is 24605325.

523506420 is a `hidden beast` number, since 5 + 235 + 0 + 6 + 420 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 369100944 + 154405476 = 19212^2 + 12426^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1454005 + ... + 1454364.

Almost surely, 2^523506420 is an apocalyptic number.

It is an amenable number.

523506420 is an abundant number, since it is smaller than the sum of its proper divisors (1064463600).

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

523506420 is a wasteful number, since it uses less digits than its factorization.

523506420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2908384 (or 2908379 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 523506420 is about 22880.2626733174. The cubic root of 523506420 is about 805.9485853659.

The spelling of 523506420 in words is "five hundred twenty-three million, five hundred six thousand, four hundred twenty".