64267520 has 144 divisors (see below), whose sum is σ = 167771520. Its totient is φ = 23519232.

The previous prime is 64267513. The next prime is 64267529. The reversal of 64267520 is 2576246.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64267529) 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, 1089251 + ... + 1089309.

It is an arithmetic number, because the mean of its divisors is an integer number (1165080).

Almost surely, 2^64267520 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 64267520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83885760).

64267520 is an abundant number, since it is smaller than the sum of its proper divisors (103504000).

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

64267520 is a wasteful number, since it uses less digits than its factorization.

64267520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 64267520 is about 8016.7025640222. The cubic root of 64267520 is about 400.5565585805.

The spelling of 64267520 in words is "sixty-four million, two hundred sixty-seven thousand, five hundred twenty".