64613808 has 160 divisors (see below), whose sum is σ = 221414400. Its totient is φ = 17639424.

The previous prime is 64613807. The next prime is 64613819. The reversal of 64613808 is 80831646.

It is a happy number.

64613808 is a `hidden beast` number, since 646 + 1 + 3 + 8 + 0 + 8 = 666.

It is a super-4 number, since 4×64613808⁴ (a number of 32 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (64613807) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69088 + ... + 70016.

It is an arithmetic number, because the mean of its divisors is an integer number (1383840).

Almost surely, 2^64613808 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 64613808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110707200).

64613808 is an abundant number, since it is smaller than the sum of its proper divisors (156800592).

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

64613808 is a wasteful number, since it uses less digits than its factorization.

64613808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976 (or 964 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 64613808 is about 8038.2714559786. The cubic root of 64613808 is about 401.2747002001.

The spelling of 64613808 in words is "sixty-four million, six hundred thirteen thousand, eight hundred eight".