64163240 has 16 divisors (see below), whose sum is σ = 144367380. Its totient is φ = 25665280.

The previous prime is 64163227. The next prime is 64163249. The reversal of 64163240 is 4236146.

64163240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 61058596 + 3104644 = 7814^2 + 1762^2 .

It is not an unprimeable number, because it can be changed into a prime (64163249) by changing a digit.

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, 802001 + ... + 802080.

Almost surely, 2^64163240 is an apocalyptic number.

It is an amenable number.

64163240 is an abundant number, since it is smaller than the sum of its proper divisors (80204140).

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

64163240 is a wasteful number, since it uses less digits than its factorization.

64163240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604092 (or 1604088 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 64163240 is about 8010.1960025957. The cubic root of 64163240 is about 400.3397946007.

Adding to 64163240 its reverse (4236146), we get a palindrome (68399386).

The spelling of 64163240 in words is "sixty-four million, one hundred sixty-three thousand, two hundred forty".