64897868 has 24 divisors (see below), whose sum is σ = 131443200. Its totient is φ = 27460368.

The previous prime is 64897867. The next prime is 64897883. The reversal of 64897868 is 86879846.

It is not an unprimeable number, because it can be changed into a prime (64897867) 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, 12458 + ... + 16881.

It is an arithmetic number, because the mean of its divisors is an integer number (5476800).

Almost surely, 2^64897868 is an apocalyptic number.

It is an amenable number.

64897868 is an abundant number, since it is smaller than the sum of its proper divisors (66545332).

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

64897868 is a wasteful number, since it uses less digits than its factorization.

64897868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29429 (or 29427 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 56.

The square root of 64897868 is about 8055.9213005093. The cubic root of 64897868 is about 401.8618784087.

The spelling of 64897868 in words is "sixty-four million, eight hundred ninety-seven thousand, eight hundred sixty-eight".