64687288 has 8 divisors (see below), whose sum is σ = 121288680. Its totient is φ = 32343640.

The previous prime is 64687253. The next prime is 64687289. The reversal of 64687288 is 88278646.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64687289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4042948 + ... + 4042963.

It is an arithmetic number, because the mean of its divisors is an integer number (15161085).

Almost surely, 2^64687288 is an apocalyptic number.

It is an amenable number.

64687288 is a deficient number, since it is larger than the sum of its proper divisors (56601392).

64687288 is a wasteful number, since it uses less digits than its factorization.

64687288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8085917 (or 8085913 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 49.

The square root of 64687288 is about 8042.8407916606. The cubic root of 64687288 is about 401.4267548756.

The spelling of 64687288 in words is "sixty-four million, six hundred eighty-seven thousand, two hundred eighty-eight".