64394688 has 84 divisors (see below), whose sum is σ = 176555400. Its totient is φ = 20712960.

The previous prime is 64394663. The next prime is 64394767. The reversal of 64394688 is 88649346.

64394688 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 184338 + ... + 184686.

It is an arithmetic number, because the mean of its divisors is an integer number (2101850).

Almost surely, 2^64394688 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 64394688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88277700).

64394688 is an abundant number, since it is smaller than the sum of its proper divisors (112160712).

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

64394688 is a wasteful number, since it uses less digits than its factorization.

64394688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426 (or 385 counting only the distinct ones).

The product of its digits is 995328, while the sum is 48.

The square root of 64394688 is about 8024.6300849323. The cubic root of 64394688 is about 400.8205821280.

The spelling of 64394688 in words is "sixty-four million, three hundred ninety-four thousand, six hundred eighty-eight".