64888320 has 320 divisors, whose sum is σ = 254555136. Its totient is φ = 13762560.

The previous prime is 64888297. The next prime is 64888349. The reversal of 64888320 is 2388846.

It is a tau number, because it is divible by the number of its divisors (320).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 913885 + ... + 913955.

Almost surely, 2^64888320 is an apocalyptic number.

64888320 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 64888320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127277568).

64888320 is an abundant number, since it is smaller than the sum of its proper divisors (189666816).

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

64888320 is a wasteful number, since it uses less digits than its factorization.

64888320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 105 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 64888320 is about 8055.3286711344. The cubic root of 64888320 is about 401.8421696698.

The spelling of 64888320 in words is "sixty-four million, eight hundred eighty-eight thousand, three hundred twenty".