64448320 has 28 divisors (see below), whose sum is σ = 153468324. Its totient is φ = 25779200.

The previous prime is 64448303. The next prime is 64448341. The reversal of 64448320 is 2384446.

It can be written as a sum of positive squares in 2 ways, for example, as 16451136 + 47997184 = 4056^2 + 6928^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100381 + ... + 101020.

Almost surely, 2^64448320 is an apocalyptic number.

It is an amenable number.

64448320 is an abundant number, since it is smaller than the sum of its proper divisors (89020004).

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

64448320 is a wasteful number, since it uses less digits than its factorization.

64448320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201418 (or 201408 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

The square root of 64448320 is about 8027.9711010940. The cubic root of 64448320 is about 400.9318275579.

The spelling of 64448320 in words is "sixty-four million, four hundred forty-eight thousand, three hundred twenty".