64234320 has 40 divisors (see below), whose sum is σ = 199127136. Its totient is φ = 17129088.

The previous prime is 64234309. The next prime is 64234321. The reversal of 64234320 is 2343246.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64234321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133582 + ... + 134061.

Almost surely, 2^64234320 is an apocalyptic number.

64234320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64234320 is an abundant number, since it is smaller than the sum of its proper divisors (134892816).

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

64234320 is a wasteful number, since it uses less digits than its factorization.

64234320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267659 (or 267653 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 64234320 is about 8014.6316197315. The cubic root of 64234320 is about 400.4875721088.

Adding to 64234320 its reverse (2343246), we get a palindrome (66577566).

The spelling of 64234320 in words is "sixty-four million, two hundred thirty-four thousand, three hundred twenty".