68643444 has 24 divisors (see below), whose sum is σ = 160320160. Its totient is φ = 22859424.

The previous prime is 68643401. The next prime is 68643451. The reversal of 68643444 is 44434686.

It is a super-2 number, since 2×68643444² = 9423844808362272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15147 + ... + 19149.

Almost surely, 2^68643444 is an apocalyptic number.

It is an amenable number.

68643444 is an abundant number, since it is smaller than the sum of its proper divisors (91676716).

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

68643444 is a wasteful number, since it uses less digits than its factorization.

68643444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5439 (or 5437 counting only the distinct ones).

The product of its digits is 221184, while the sum is 39.

The square root of 68643444 is about 8285.1339156347. The cubic root of 68643444 is about 409.4488807784.

The spelling of 68643444 in words is "sixty-eight million, six hundred forty-three thousand, four hundred forty-four".