532640640 has 128 divisors (see below), whose sum is σ = 1940382720. Its totient is φ = 121743360.

The previous prime is 532640621. The next prime is 532640653. The reversal of 532640640 is 46046235.

It is a tau number, because it is divible by the number of its divisors (128).

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 = 532640598 and 532640607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6376 + ... + 33255.

It is an arithmetic number, because the mean of its divisors is an integer number (15159240).

Almost surely, 2^532640640 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 532640640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (970191360).

532640640 is an abundant number, since it is smaller than the sum of its proper divisors (1407742080).

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

532640640 is a wasteful number, since it uses less digits than its factorization.

532640640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39660 (or 39648 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 532640640 is about 23079.0086442204. The cubic root of 532640640 is about 810.6090222362.

Adding to 532640640 its reverse (46046235), we get a palindrome (578686875).

The spelling of 532640640 in words is "five hundred thirty-two million, six hundred forty thousand, six hundred forty".