64219344 has 80 divisors (see below), whose sum is σ = 191178240. Its totient is φ = 18195840.

The previous prime is 64219313. The next prime is 64219361. The reversal of 64219344 is 44391246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43287 + ... + 44745.

It is an arithmetic number, because the mean of its divisors is an integer number (2389728).

Almost surely, 2^64219344 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 64219344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95589120).

64219344 is an abundant number, since it is smaller than the sum of its proper divisors (126958896).

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

64219344 is a wasteful number, since it uses less digits than its factorization.

64219344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1608 (or 1602 counting only the distinct ones).

The product of its digits is 20736, while the sum is 33.

The square root of 64219344 is about 8013.6972740427. The cubic root of 64219344 is about 400.4564456121.

The spelling of 64219344 in words is "sixty-four million, two hundred nineteen thousand, three hundred forty-four".