64540232 has 16 divisors (see below), whose sum is σ = 123965100. Its totient is φ = 31482880.

The previous prime is 64540213. The next prime is 64540243. The reversal of 64540232 is 23204546.

64540232 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 54967396 + 9572836 = 7414^2 + 3094^2 .

It is a super-2 number, since 2×64540232² = 8330883093227648, which contains 22 as substring.

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, 98057 + ... + 98712.

Almost surely, 2^64540232 is an apocalyptic number.

It is an amenable number.

64540232 is a deficient number, since it is larger than the sum of its proper divisors (59424868).

64540232 is a wasteful number, since it uses less digits than its factorization.

64540232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196816 (or 196812 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 64540232 is about 8033.6935465575. The cubic root of 64540232 is about 401.1223313191.

Adding to 64540232 its reverse (23204546), we get a palindrome (87744778).

The spelling of 64540232 in words is "sixty-four million, five hundred forty thousand, two hundred thirty-two".