64393744 has 40 divisors (see below), whose sum is σ = 130920192. Its totient is φ = 30624000.

The previous prime is 64393729. The next prime is 64393751. The reversal of 64393744 is 44739346.

It is a junction number, because it is equal to n+sod(n) for n = 64393697 and 64393706.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85369 + ... + 86119.

Almost surely, 2^64393744 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 64393744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65460096).

64393744 is an abundant number, since it is smaller than the sum of its proper divisors (66526448).

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

64393744 is a wasteful number, since it uses less digits than its factorization.

64393744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015 (or 1009 counting only the distinct ones).

The product of its digits is 217728, while the sum is 40.

The square root of 64393744 is about 8024.5712658060. The cubic root of 64393744 is about 400.8186234960.

The spelling of 64393744 in words is "sixty-four million, three hundred ninety-three thousand, seven hundred forty-four".