64448748 has 144 divisors (see below), whose sum is σ = 203513856. Its totient is φ = 16744320.

The previous prime is 64448743. The next prime is 64448749. The reversal of 64448748 is 84784446.

It is a super-2 number, since 2×64448748² = 8307282237535008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64448743) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 337333 + ... + 337523.

Almost surely, 2^64448748 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64448748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101756928).

64448748 is an abundant number, since it is smaller than the sum of its proper divisors (139065108).

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

64448748 is a wasteful number, since it uses less digits than its factorization.

64448748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324 (or 319 counting only the distinct ones).

The product of its digits is 688128, while the sum is 45.

The square root of 64448748 is about 8027.9977578472. The cubic root of 64448748 is about 400.9327150826.

The spelling of 64448748 in words is "sixty-four million, four hundred forty-eight thousand, seven hundred forty-eight".