68211784 has 32 divisors (see below), whose sum is σ = 130429440. Its totient is φ = 33436800.

The previous prime is 68211761. The next prime is 68211809. The reversal of 68211784 is 48711286.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158049 + ... + 158479.

It is an arithmetic number, because the mean of its divisors is an integer number (4075920).

Almost surely, 2^68211784 is an apocalyptic number.

It is an amenable number.

68211784 is a deficient number, since it is larger than the sum of its proper divisors (62217656).

68211784 is a wasteful number, since it uses less digits than its factorization.

68211784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781 (or 777 counting only the distinct ones).

The product of its digits is 21504, while the sum is 37.

The square root of 68211784 is about 8259.0425595223. The cubic root of 68211784 is about 408.5888108684.

The spelling of 68211784 in words is "sixty-eight million, two hundred eleven thousand, seven hundred eighty-four".