64270320 has 80 divisors (see below), whose sum is σ = 200156832. Its totient is φ = 17059840.

The previous prime is 64270313. The next prime is 64270321. The reversal of 64270320 is 2307246.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-3 number, since 3×64270320³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64270321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66964 + ... + 67916.

Almost surely, 2^64270320 is an apocalyptic number.

64270320 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 64270320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100078416).

64270320 is an abundant number, since it is smaller than the sum of its proper divisors (135886512).

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

64270320 is a wasteful number, since it uses less digits than its factorization.

64270320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1250 (or 1244 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 64270320 is about 8016.8771975128. The cubic root of 64270320 is about 400.5623756303.

Adding to 64270320 its reverse (2307246), we get a palindrome (66577566).

The spelling of 64270320 in words is "sixty-four million, two hundred seventy thousand, three hundred twenty".