523151440 has 120 divisors (see below), whose sum is σ = 1422745992. Its totient is φ = 178375680.

The previous prime is 523151413. The next prime is 523151479. The reversal of 523151440 is 44151325.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 48608784 + 474542656 = 6972^2 + 21784^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1242430 + ... + 1242850.

Almost surely, 2^523151440 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 523151440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (711372996).

523151440 is an abundant number, since it is smaller than the sum of its proper divisors (899594552).

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

523151440 is a wasteful number, since it uses less digits than its factorization.

523151440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765 (or 752 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 523151440 is about 22872.5040168321. The cubic root of 523151440 is about 805.7663779101.

The spelling of 523151440 in words is "five hundred twenty-three million, one hundred fifty-one thousand, four hundred forty".