64689268 has 12 divisors (see below), whose sum is σ = 129378592. Its totient is φ = 27723960.

The previous prime is 64689257. The next prime is 64689269. The reversal of 64689268 is 86298646.

64689268 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64689269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1155138 + ... + 1155193.

Almost surely, 2^64689268 is an apocalyptic number.

It is an amenable number.

64689268 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

64689268 is a wasteful number, since it uses less digits than its factorization.

64689268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2310342 (or 2310340 counting only the distinct ones).

The product of its digits is 995328, while the sum is 49.

The square root of 64689268 is about 8042.9638815551. The cubic root of 64689268 is about 401.4308505637.

The spelling of 64689268 in words is "sixty-four million, six hundred eighty-nine thousand, two hundred sixty-eight".