68444818 has 8 divisors (see below), whose sum is σ = 110564748. Its totient is φ = 31589904.

The previous prime is 68444801. The next prime is 68444861. The reversal of 68444818 is 81844486.

It can be written as a sum of positive squares in 2 ways, for example, as 63792169 + 4652649 = 7987^2 + 2157^2 .

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

It is a super-2 number, since 2×68444818² = 9369386222106248, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1316221 + ... + 1316272.

Almost surely, 2^68444818 is an apocalyptic number.

68444818 is a deficient number, since it is larger than the sum of its proper divisors (42119930).

68444818 is a wasteful number, since it uses less digits than its factorization.

68444818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2632508.

The product of its digits is 196608, while the sum is 43.

The square root of 68444818 is about 8273.1383404365. The cubic root of 68444818 is about 409.0535734846.

The spelling of 68444818 in words is "sixty-eight million, four hundred forty-four thousand, eight hundred eighteen".