523453440 has 176 divisors, whose sum is σ = 1708475328. Its totient is φ = 136740864.

The previous prime is 523453433. The next prime is 523453453. The reversal of 523453440 is 44354325.

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 = 523453398 and 523453407.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 813759 + ... + 814401.

Almost surely, 2^523453440 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 523453440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (854237664).

523453440 is an abundant number, since it is smaller than the sum of its proper divisors (1185021888).

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

523453440 is a wasteful number, since it uses less digits than its factorization.

523453440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724 (or 706 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 30.

The square root of 523453440 is about 22879.1048775952. The cubic root of 523453440 is about 805.9213965261.

The spelling of 523453440 in words is "five hundred twenty-three million, four hundred fifty-three thousand, four hundred forty".