64426384 has 40 divisors (see below), whose sum is σ = 139357152. Its totient is φ = 28600320.

The previous prime is 64426357. The next prime is 64426387. The reversal of 64426384 is 48362446.

It is not an unprimeable number, because it can be changed into a prime (64426387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3312 + ... + 11824.

Almost surely, 2^64426384 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 64426384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69678576).

64426384 is an abundant number, since it is smaller than the sum of its proper divisors (74930768).

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

64426384 is a wasteful number, since it uses less digits than its factorization.

64426384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8575 (or 8569 counting only the distinct ones).

The product of its digits is 110592, while the sum is 37.

The square root of 64426384 is about 8026.6047616660. The cubic root of 64426384 is about 400.8863345769.

It can be divided in two parts, 644 and 26384, that added together give a triangular number (27028 = T₂₃₂).

The spelling of 64426384 in words is "sixty-four million, four hundred twenty-six thousand, three hundred eighty-four".