523653420 has 48 divisors (see below), whose sum is σ = 1529982720. Its totient is φ = 133569216.

The previous prime is 523653401. The next prime is 523653421. The reversal of 523653420 is 24356325.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (523653421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188350 + ... + 191109.

It is an arithmetic number, because the mean of its divisors is an integer number (31874640).

Almost surely, 2^523653420 is an apocalyptic number.

It is an amenable number.

523653420 is an abundant number, since it is smaller than the sum of its proper divisors (1006329300).

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

523653420 is a wasteful number, since it uses less digits than its factorization.

523653420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379494 (or 379492 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 30.

The square root of 523653420 is about 22883.4748235490. The cubic root of 523653420 is about 806.0240147844.

The spelling of 523653420 in words is "five hundred twenty-three million, six hundred fifty-three thousand, four hundred twenty".