64887936 has 64 divisors (see below), whose sum is σ = 177055680. Its totient is φ = 21040128.

The previous prime is 64887931. The next prime is 64887941. The reversal of 64887936 is 63978846.

It is an interprime number because it is at equal distance from previous prime (64887931) and next prime (64887941).

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (64887931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11925 + ... + 16491.

It is an arithmetic number, because the mean of its divisors is an integer number (2766495).

Almost surely, 2^64887936 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 64887936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88527840).

64887936 is an abundant number, since it is smaller than the sum of its proper divisors (112167744).

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

64887936 is a wasteful number, since it uses less digits than its factorization.

64887936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4621 (or 4609 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 51.

The square root of 64887936 is about 8055.3048359451. The cubic root of 64887936 is about 401.8413769864.

The spelling of 64887936 in words is "sixty-four million, eight hundred eighty-seven thousand, nine hundred thirty-six".