64697344 has 88 divisors (see below), whose sum is σ = 140309568. Its totient is φ = 29736960.

The previous prime is 64697317. The next prime is 64697377. The reversal of 64697344 is 44379646.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 64697344.

It is a congruent number.

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, 965599 + ... + 965665.

Almost surely, 2^64697344 is an apocalyptic number.

64697344 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64697344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70154784).

64697344 is an abundant number, since it is smaller than the sum of its proper divisors (75612224).

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

64697344 is a wasteful number, since it uses less digits than its factorization.

64697344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151 (or 133 counting only the distinct ones).

The product of its digits is 435456, while the sum is 43.

The square root of 64697344 is about 8043.4659196145. The cubic root of 64697344 is about 401.4475551411.

The spelling of 64697344 in words is "sixty-four million, six hundred ninety-seven thousand, three hundred forty-four".