64472320 has 144 divisors (see below), whose sum is σ = 178073280. Its totient is φ = 22118400.

The previous prime is 64472293. The next prime is 64472321. The reversal of 64472320 is 2327446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64472321) 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, 267400 + ... + 267640.

It is an arithmetic number, because the mean of its divisors is an integer number (1236620).

Almost surely, 2^64472320 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 64472320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89036640).

64472320 is an abundant number, since it is smaller than the sum of its proper divisors (113600960).

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

64472320 is a wasteful number, since it uses less digits than its factorization.

64472320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 278 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 64472320 is about 8029.4657356514. The cubic root of 64472320 is about 400.9815892361.

Adding to 64472320 its reverse (2327446), we get a palindrome (66799766).

The spelling of 64472320 in words is "sixty-four million, four hundred seventy-two thousand, three hundred twenty".