64222144 has 42 divisors (see below), whose sum is σ = 148254720. Its totient is φ = 27522432.

The previous prime is 64222139. The next prime is 64222183. The reversal of 64222144 is 44122246.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7104 + ... + 13375.

Almost surely, 2^64222144 is an apocalyptic number.

64222144 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

64222144 is an abundant number, since it is smaller than the sum of its proper divisors (84032576).

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

64222144 is a wasteful number, since it uses less digits than its factorization.

64222144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20505 (or 20488 counting only the distinct ones).

The product of its digits is 3072, while the sum is 25.

The square root of 64222144 is about 8013.8719730228. The cubic root of 64222144 is about 400.4622655706.

The spelling of 64222144 in words is "sixty-four million, two hundred twenty-two thousand, one hundred forty-four".