68249784 has 64 divisors (see below), whose sum is σ = 175190400. Its totient is φ = 22149504.

The previous prime is 68249749. The next prime is 68249791. The reversal of 68249784 is 48794286.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222159 + ... + 222465.

It is an arithmetic number, because the mean of its divisors is an integer number (2737350).

Almost surely, 2^68249784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68249784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87595200).

68249784 is an abundant number, since it is smaller than the sum of its proper divisors (106940616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68249784 is a wasteful number, since it uses less digits than its factorization.

68249784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532 (or 528 counting only the distinct ones).

The product of its digits is 774144, while the sum is 48.

The square root of 68249784 is about 8261.3427480041. The cubic root of 68249784 is about 408.6646701585.

The spelling of 68249784 in words is "sixty-eight million, two hundred forty-nine thousand, seven hundred eighty-four".