64387960 has 192 divisors, whose sum is σ = 192024000. Its totient is φ = 19305216.

The previous prime is 64387957. The next prime is 64387969. The reversal of 64387960 is 6978346.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64387969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3388831 + ... + 3388849.

It is an arithmetic number, because the mean of its divisors is an integer number (1000125).

Almost surely, 2^64387960 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 64387960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96012000).

64387960 is an abundant number, since it is smaller than the sum of its proper divisors (127636040).

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

64387960 is a wasteful number, since it uses less digits than its factorization.

64387960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83 (or 46 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 64387960 is about 8024.2108646271. The cubic root of 64387960 is about 400.8066223078.

The spelling of 64387960 in words is "sixty-four million, three hundred eighty-seven thousand, nine hundred sixty".