64448020 has 96 divisors (see below), whose sum is σ = 176456448. Its totient is φ = 19187712.

The previous prime is 64447993. The next prime is 64448077. The reversal of 64448020 is 2084446.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 64448020.

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, 29899 + ... + 31981.

It is an arithmetic number, because the mean of its divisors is an integer number (1838088).

Almost surely, 2^64448020 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 64448020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88228224).

64448020 is an abundant number, since it is smaller than the sum of its proper divisors (112008428).

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

64448020 is a wasteful number, since it uses less digits than its factorization.

64448020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2129 (or 2127 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 64448020 is about 8027.9524164011. The cubic root of 64448020 is about 400.9312054587.

The spelling of 64448020 in words is "sixty-four million, four hundred forty-eight thousand, twenty".