64438626 has 48 divisors (see below), whose sum is σ = 151027200. Its totient is φ = 18275040.

The previous prime is 64438607. The next prime is 64438637. The reversal of 64438626 is 62683446.

64438626 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

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 23 ways as a sum of consecutive naturals, for example, 43071 + ... + 44541.

It is an arithmetic number, because the mean of its divisors is an integer number (3146400).

Almost surely, 2^64438626 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64438626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75513600).

64438626 is an abundant number, since it is smaller than the sum of its proper divisors (86588574).

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

64438626 is a wasteful number, since it uses less digits than its factorization.

64438626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1639 (or 1632 counting only the distinct ones).

The product of its digits is 165888, while the sum is 39.

The square root of 64438626 is about 8027.3673143815. The cubic root of 64438626 is about 400.9117244839.

The spelling of 64438626 in words is "sixty-four million, four hundred thirty-eight thousand, six hundred twenty-six".