523570440 has 64 divisors (see below), whose sum is σ = 1576402560. Its totient is φ = 139112960.

The previous prime is 523570433. The next prime is 523570457. The reversal of 523570440 is 44075325.

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

It is a junction number, because it is equal to n+sod(n) for n = 523570398 and 523570407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25957 + ... + 41483.

It is an arithmetic number, because the mean of its divisors is an integer number (24631290).

Almost surely, 2^523570440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 523570440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (788201280).

523570440 is an abundant number, since it is smaller than the sum of its proper divisors (1052832120).

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

523570440 is a wasteful number, since it uses less digits than its factorization.

523570440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15822 (or 15818 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 30.

The square root of 523570440 is about 22881.6616529482. The cubic root of 523570440 is about 805.9814373828.

The spelling of 523570440 in words is "five hundred twenty-three million, five hundred seventy thousand, four hundred forty".