68820856 has 48 divisors (see below), whose sum is σ = 141312600. Its totient is φ = 31404672.

The previous prime is 68820833. The next prime is 68820877. The reversal of 68820856 is 65802886.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 147135 + ... + 147601.

Almost surely, 2^68820856 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 68820856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70656300).

68820856 is an abundant number, since it is smaller than the sum of its proper divisors (72491744).

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

68820856 is a wasteful number, since it uses less digits than its factorization.

68820856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608 (or 591 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 43.

The square root of 68820856 is about 8295.8336531056. The cubic root of 68820856 is about 409.8013235314.

The spelling of 68820856 in words is "sixty-eight million, eight hundred twenty thousand, eight hundred fifty-six".