64381232 has 40 divisors (see below), whose sum is σ = 131214816. Its totient is φ = 30542336.

The previous prime is 64381231. The next prime is 64381237. The reversal of 64381232 is 23218346.

It is a junction number, because it is equal to n+sod(n) for n = 64381195 and 64381204.

It is not an unprimeable number, because it can be changed into a prime (64381231) 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, 49778 + ... + 51054.

Almost surely, 2^64381232 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 64381232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65607408).

64381232 is an abundant number, since it is smaller than the sum of its proper divisors (66833584).

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

64381232 is a wasteful number, since it uses less digits than its factorization.

64381232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445 (or 1439 counting only the distinct ones).

The product of its digits is 6912, while the sum is 29.

The square root of 64381232 is about 8023.7916224189. The cubic root of 64381232 is about 400.7926615151.

Adding to 64381232 its reverse (23218346), we get a palindrome (87599578).

The spelling of 64381232 in words is "sixty-four million, three hundred eighty-one thousand, two hundred thirty-two".