64408320 has 108 divisors (see below), whose sum is σ = 222885936. Its totient is φ = 17172480.

The previous prime is 64408313. The next prime is 64408327. The reversal of 64408320 is 2380446.

It is an interprime number because it is at equal distance from previous prime (64408313) and next prime (64408327).

It is not an unprimeable number, because it can be changed into a prime (64408327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8725 + ... + 14315.

Almost surely, 2^64408320 is an apocalyptic number.

64408320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64408320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111442968).

64408320 is an abundant number, since it is smaller than the sum of its proper divisors (158477616).

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

64408320 is a wasteful number, since it uses less digits than its factorization.

64408320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5618 (or 5601 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 64408320 is about 8025.4794249316. The cubic root of 64408320 is about 400.8488639673.

Adding to 64408320 its reverse (2380446), we get a palindrome (66788766).

The spelling of 64408320 in words is "sixty-four million, four hundred eight thousand, three hundred twenty".