64228444 has 24 divisors (see below), whose sum is σ = 129113600. Its totient is φ = 27385776.

The previous prime is 64228441. The next prime is 64228447. The reversal of 64228444 is 44482246.

It is an interprime number because it is at equal distance from previous prime (64228441) and next prime (64228447).

It is a super-2 number, since 2×64228444² = 8250586037322272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64228441) 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, 192 + ... + 11335.

Almost surely, 2^64228444 is an apocalyptic number.

It is an amenable number.

64228444 is an abundant number, since it is smaller than the sum of its proper divisors (64885156).

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

64228444 is a wasteful number, since it uses less digits than its factorization.

64228444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11737 (or 11735 counting only the distinct ones).

The product of its digits is 49152, while the sum is 34.

The square root of 64228444 is about 8014.2650318042. The cubic root of 64228444 is about 400.4753598587.

The spelling of 64228444 in words is "sixty-four million, two hundred twenty-eight thousand, four hundred forty-four".