523214640 has 200 divisors, whose sum is σ = 1957301808. Its totient is φ = 128770560.

The previous prime is 523214623. The next prime is 523214641. The reversal of 523214640 is 46412325.

523214640 is a `hidden beast` number, since 5 + 2 + 3 + 2 + 14 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (523214641) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 81135 + ... + 87345.

Almost surely, 2^523214640 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 523214640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (978650904).

523214640 is an abundant number, since it is smaller than the sum of its proper divisors (1434087168).

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

523214640 is a wasteful number, since it uses less digits than its factorization.

523214640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6249 (or 6234 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 523214640 is about 22873.8855466228. The cubic root of 523214640 is about 805.7988238271.

Adding to 523214640 its reverse (46412325), we get a palindrome (569626965).

The spelling of 523214640 in words is "five hundred twenty-three million, two hundred fourteen thousand, six hundred forty".