523340640 has 72 divisors (see below), whose sum is σ = 1785904848. Its totient is φ = 139557120.

The previous prime is 523340627. The next prime is 523340651. The reversal of 523340640 is 46043325.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 180276 + ... + 183155.

It is an arithmetic number, because the mean of its divisors is an integer number (24804234).

Almost surely, 2^523340640 is an apocalyptic number.

It is an amenable number.

523340640 is an abundant number, since it is smaller than the sum of its proper divisors (1262564208).

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

523340640 is a wasteful number, since it uses less digits than its factorization.

523340640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363452 (or 363441 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 523340640 is about 22876.6396133698. The cubic root of 523340640 is about 805.8635025109.

Adding to 523340640 its reverse (46043325), we get a palindrome (569383965).

The spelling of 523340640 in words is "five hundred twenty-three million, three hundred forty thousand, six hundred forty".