523388660 has 24 divisors (see below), whose sum is σ = 1103925480. Its totient is φ = 208439424.

The previous prime is 523388659. The next prime is 523388689. The reversal of 523388660 is 66883325.

It can be written as a sum of positive squares in 4 ways, for example, as 194546704 + 328841956 = 13948^2 + 18134^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52559 + ... + 61718.

It is an arithmetic number, because the mean of its divisors is an integer number (45996895).

Almost surely, 2^523388660 is an apocalyptic number.

It is an amenable number.

523388660 is an abundant number, since it is smaller than the sum of its proper divisors (580536820).

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

523388660 is a wasteful number, since it uses less digits than its factorization.

523388660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114515 (or 114513 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 41.

The square root of 523388660 is about 22877.6891315535. The cubic root of 523388660 is about 805.8881495437. Note that the first 3 decimals are identical.

The spelling of 523388660 in words is "five hundred twenty-three million, three hundred eighty-eight thousand, six hundred sixty".