68218964 has 12 divisors (see below), whose sum is σ = 130236288. Its totient is φ = 31008600.

The previous prime is 68218963. The next prime is 68218973. The reversal of 68218964 is 46981286.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 1550431 = 68218964 / (6 + 8 + 2 + 1 + 8 + 9 + 6 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68218961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 775172 + ... + 775259.

It is an arithmetic number, because the mean of its divisors is an integer number (10853024).

Almost surely, 2^68218964 is an apocalyptic number.

It is an amenable number.

68218964 is a deficient number, since it is larger than the sum of its proper divisors (62017324).

68218964 is a wasteful number, since it uses less digits than its factorization.

68218964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1550446 (or 1550444 counting only the distinct ones).

The product of its digits is 165888, while the sum is 44.

The square root of 68218964 is about 8259.4772231661. The cubic root of 68218964 is about 408.6031464400.

The spelling of 68218964 in words is "sixty-eight million, two hundred eighteen thousand, nine hundred sixty-four".