64404321 has 8 divisors (see below), whose sum is σ = 86007744. Its totient is φ = 42868560.

The previous prime is 64404287. The next prime is 64404337. The reversal of 64404321 is 12340446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64404321 - 2⁶ = 64404257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64404291 and 64404300.

It is not an unprimeable number, because it can be changed into a prime (64404371) 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, 14650 + ... + 18531.

It is an arithmetic number, because the mean of its divisors is an integer number (10750968).

Almost surely, 2^64404321 is an apocalyptic number.

It is an amenable number.

64404321 is a deficient number, since it is larger than the sum of its proper divisors (21603423).

64404321 is a wasteful number, since it uses less digits than its factorization.

64404321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33831.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 64404321 is about 8025.2302770699. The cubic root of 64404321 is about 400.8405677938.

Adding to 64404321 its reverse (12340446), we get a palindrome (76744767).

The spelling of 64404321 in words is "sixty-four million, four hundred four thousand, three hundred twenty-one".