64247808 has 48 divisors (see below), whose sum is σ = 171302040. Its totient is φ = 21413888.

The previous prime is 64247803. The next prime is 64247831. The reversal of 64247808 is 80874246.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64247801) 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, 916 + ... + 11372.

Almost surely, 2^64247808 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 64247808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85651020).

64247808 is an abundant number, since it is smaller than the sum of its proper divisors (107054232).

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

64247808 is a wasteful number, since it uses less digits than its factorization.

64247808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10482 (or 10462 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 39.

The square root of 64247808 is about 8015.4730365712. The cubic root of 64247808 is about 400.5156017681.

The spelling of 64247808 in words is "sixty-four million, two hundred forty-seven thousand, eight hundred eight".