68644286 has 4 divisors (see below), whose sum is σ = 102966432. Its totient is φ = 34322142.

The previous prime is 68644267. The next prime is 68644307. The reversal of 68644286 is 68244686.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68244686 = 2 ⋅34122343.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17161070 + ... + 17161073.

It is an arithmetic number, because the mean of its divisors is an integer number (25741608).

Almost surely, 2^68644286 is an apocalyptic number.

68644286 is a deficient number, since it is larger than the sum of its proper divisors (34322146).

68644286 is a wasteful number, since it uses less digits than its factorization.

68644286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34322145.

The product of its digits is 442368, while the sum is 44.

The square root of 68644286 is about 8285.1847293829. The cubic root of 68644286 is about 409.4505549103.

The spelling of 68644286 in words is "sixty-eight million, six hundred forty-four thousand, two hundred eighty-six".