64443442 has 16 divisors (see below), whose sum is σ = 112560192. Its totient is φ = 27097200.

The previous prime is 64443437. The next prime is 64443473. The reversal of 64443442 is 24434446.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42684 + ... + 44167.

It is an arithmetic number, because the mean of its divisors is an integer number (7035012).

Almost surely, 2^64443442 is an apocalyptic number.

64443442 is a deficient number, since it is larger than the sum of its proper divisors (48116750).

64443442 is a wasteful number, since it uses less digits than its factorization.

64443442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86913.

The product of its digits is 36864, while the sum is 31.

The square root of 64443442 is about 8027.6672825921. The cubic root of 64443442 is about 400.9217119862.

Adding to 64443442 its reverse (24434446), we get a palindrome (88877888).

The spelling of 64443442 in words is "sixty-four million, four hundred forty-three thousand, four hundred forty-two".