64248320 has 40 divisors (see below), whose sum is σ = 154051524. Its totient is φ = 25698304.

The previous prime is 64248313. The next prime is 64248323. The reversal of 64248320 is 2384246.

It can be written as a sum of positive squares in 2 ways, for example, as 62220544 + 2027776 = 7888^2 + 1424^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (64248323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9989 + ... + 15108.

Almost surely, 2^64248320 is an apocalyptic number.

It is an amenable number.

64248320 is an abundant number, since it is smaller than the sum of its proper divisors (89803204).

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

64248320 is an equidigital number, since it uses as much as digits as its factorization.

64248320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25120 (or 25104 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 64248320 is about 8015.5049747349. The cubic root of 64248320 is about 400.5166656874.

The spelling of 64248320 in words is "sixty-four million, two hundred forty-eight thousand, three hundred twenty".