64442222 has 8 divisors (see below), whose sum is σ = 104099016. Its totient is φ = 29742552.

The previous prime is 64442221. The next prime is 64442237. The reversal of 64442222 is 22224446.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 2478547 = 64442222 / (6 + 4 + 4 + 4 + 2 + 2 + 2 + 2).

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 64442191 and 64442200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64442221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1239248 + ... + 1239299.

It is an arithmetic number, because the mean of its divisors is an integer number (13012377).

Almost surely, 2^64442222 is an apocalyptic number.

64442222 is a deficient number, since it is larger than the sum of its proper divisors (39656794).

64442222 is a wasteful number, since it uses less digits than its factorization.

64442222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2478562.

The product of its digits is 6144, while the sum is 26.

The square root of 64442222 is about 8027.5912950274. The cubic root of 64442222 is about 400.9191819766.

Adding to 64442222 its reverse (22224446), we get a palindrome (86666668).

The spelling of 64442222 in words is "sixty-four million, four hundred forty-two thousand, two hundred twenty-two".