852640240 has 20 divisors (see below), whose sum is σ = 1982388744. Its totient is φ = 341056064.

The previous prime is 852640237. The next prime is 852640297. The reversal of 852640240 is 42046258.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5328922 + ... + 5329081.

Almost surely, 2^852640240 is an apocalyptic number.

852640240 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

852640240 is an abundant number, since it is smaller than the sum of its proper divisors (1129748504).

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

852640240 is a wasteful number, since it uses less digits than its factorization.

852640240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10658016 (or 10658010 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 852640240 is about 29200.0041095888. The cubic root of 852640240 is about 948.2480138243.

Adding to 852640240 its reverse (42046258), we get a palindrome (894686498).

The spelling of 852640240 in words is "eight hundred fifty-two million, six hundred forty thousand, two hundred forty".