68405776 has 40 divisors (see below), whose sum is σ = 142783520. Its totient is φ = 31643136.

The previous prime is 68405767. The next prime is 68405789. The reversal of 68405776 is 67750486.

It is a Harshad number since it is a multiple of its sum of digits (43).

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, 10456 + ... + 15688.

It is an arithmetic number, because the mean of its divisors is an integer number (3569588).

Almost surely, 2^68405776 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 68405776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71391760).

68405776 is an abundant number, since it is smaller than the sum of its proper divisors (74377744).

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

68405776 is a wasteful number, since it uses less digits than its factorization.

68405776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5303 (or 5297 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 68405776 is about 8270.7784397843. The cubic root of 68405776 is about 408.9757818289.

The spelling of 68405776 in words is "sixty-eight million, four hundred five thousand, seven hundred seventy-six".