64144344 has 32 divisors (see below), whose sum is σ = 174939840. Its totient is φ = 19437600.

The previous prime is 64144343. The next prime is 64144397. The reversal of 64144344 is 44344146.

It is a super-2 number, since 2×64144344² = 8228993734380672, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64144343) 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, 121222 + ... + 121749.

It is an arithmetic number, because the mean of its divisors is an integer number (5466870).

Almost surely, 2^64144344 is an apocalyptic number.

It is an amenable number.

64144344 is an abundant number, since it is smaller than the sum of its proper divisors (110795496).

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

64144344 is a wasteful number, since it uses less digits than its factorization.

64144344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242991 (or 242987 counting only the distinct ones).

The product of its digits is 18432, while the sum is 30.

The square root of 64144344 is about 8009.0164190118. The cubic root of 64144344 is about 400.3004908732.

The spelling of 64144344 in words is "sixty-four million, one hundred forty-four thousand, three hundred forty-four".