8432425640 has 32 divisors (see below), whose sum is σ = 19232867880. Its totient is φ = 3326764032.

The previous prime is 8432425609. The next prime is 8432425649. The reversal of 8432425640 is 465242348.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4026917764 + 4405507876 = 63458^2 + 66374^2 .

It is a super-2 number, since 2×8432425640² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8432425594 and 8432425603.

It is not an unprimeable number, because it can be changed into a prime (8432425649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1440989 + ... + 1446828.

Almost surely, 2^8432425640 is an apocalyptic number.

It is an amenable number.

8432425640 is an abundant number, since it is smaller than the sum of its proper divisors (10800442240).

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

8432425640 is a wasteful number, since it uses less digits than its factorization.

8432425640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2887901 (or 2887897 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 38.

The square root of 8432425640 is about 91828.2398829467. The cubic root of 8432425640 is about 2035.4050140954.

Adding to 8432425640 its reverse (465242348), we get a palindrome (8897667988).

The spelling of 8432425640 in words is "eight billion, four hundred thirty-two million, four hundred twenty-five thousand, six hundred forty".