64187480 has 64 divisors (see below), whose sum is σ = 172247040. Its totient is φ = 21048192.

The previous prime is 64187471. The next prime is 64187569. The reversal of 64187480 is 8478146.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1457 + ... + 11423.

It is an arithmetic number, because the mean of its divisors is an integer number (2691360).

Almost surely, 2^64187480 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 64187480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86123520).

64187480 is an abundant number, since it is smaller than the sum of its proper divisors (108059560).

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

64187480 is a wasteful number, since it uses less digits than its factorization.

64187480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10008 (or 10004 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 64187480 is about 8011.7089313080. The cubic root of 64187480 is about 400.3902025645.

The spelling of 64187480 in words is "sixty-four million, one hundred eighty-seven thousand, four hundred eighty".