64463868 has 72 divisors (see below), whose sum is σ = 192672480. Its totient is φ = 17781120.

The previous prime is 64463831. The next prime is 64463873. The reversal of 64463868 is 86836446.

64463868 is a `hidden beast` number, since 6 + 4 + 4 + 638 + 6 + 8 = 666.

It is a super-3 number, since 3×64463868³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2898 + ... + 11718.

Almost surely, 2^64463868 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 64463868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96336240).

64463868 is an abundant number, since it is smaller than the sum of its proper divisors (128208612).

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

64463868 is a wasteful number, since it uses less digits than its factorization.

64463868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8867 (or 8862 counting only the distinct ones).

The product of its digits is 663552, while the sum is 45.

The square root of 64463868 is about 8028.9394069204. The cubic root of 64463868 is about 400.9640662407.

The spelling of 64463868 in words is "sixty-four million, four hundred sixty-three thousand, eight hundred sixty-eight".