68143784 has 16 divisors (see below), whose sum is σ = 127991220. Its totient is φ = 34012800.

The previous prime is 68143781. The next prime is 68143793. The reversal of 68143784 is 48734186.

It can be written as a sum of positive squares in 2 ways, for example, as 58094884 + 10048900 = 7622^2 + 3170^2 .

It is not an unprimeable number, because it can be changed into a prime (68143781) 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, 2279 + ... + 11894.

Almost surely, 2^68143784 is an apocalyptic number.

It is an amenable number.

68143784 is a deficient number, since it is larger than the sum of its proper divisors (59847436).

68143784 is a wasteful number, since it uses less digits than its factorization.

68143784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14780 (or 14776 counting only the distinct ones).

The product of its digits is 129024, while the sum is 41.

The square root of 68143784 is about 8254.9248330921. The cubic root of 68143784 is about 408.4529923182.

The spelling of 68143784 in words is "sixty-eight million, one hundred forty-three thousand, seven hundred eighty-four".