64887944 has 24 divisors (see below), whose sum is σ = 133732830. Its totient is φ = 29494080.

The previous prime is 64887941. The next prime is 64887947. The reversal of 64887944 is 44978846.

64887944 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (64887941) and next prime (64887947).

It can be written as a sum of positive squares in only one way, i.e., 64480900 + 407044 = 8030^2 + 638^2 .

It is a junction number, because it is equal to n+sod(n) for n = 64887892 and 64887901.

It is not an unprimeable number, because it can be changed into a prime (64887941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32549 + ... + 34484.

Almost surely, 2^64887944 is an apocalyptic number.

It is an amenable number.

64887944 is an abundant number, since it is smaller than the sum of its proper divisors (68844886).

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

64887944 is a wasteful number, since it uses less digits than its factorization.

64887944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67061 (or 67046 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 50.

The square root of 64887944 is about 8055.3053325122. The cubic root of 64887944 is about 401.8413935006.

The spelling of 64887944 in words is "sixty-four million, eight hundred eighty-seven thousand, nine hundred forty-four".