68221444 has 6 divisors (see below), whose sum is σ = 119387534. Its totient is φ = 34110720.

The previous prime is 68221429. The next prime is 68221469. The reversal of 68221444 is 44412286.

It can be written as a sum of positive squares in only one way, i.e., 60996100 + 7225344 = 7810^2 + 2688^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8527677 + ... + 8527684.

Almost surely, 2^68221444 is an apocalyptic number.

It is an amenable number.

68221444 is a deficient number, since it is larger than the sum of its proper divisors (51166090).

68221444 is a wasteful number, since it uses less digits than its factorization.

68221444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17055365 (or 17055363 counting only the distinct ones).

The product of its digits is 12288, while the sum is 31.

The square root of 68221444 is about 8259.6273523689. The cubic root of 68221444 is about 408.6080977686.

The spelling of 68221444 in words is "sixty-eight million, two hundred twenty-one thousand, four hundred forty-four".