68855808 has 96 divisors (see below), whose sum is σ = 209926080. Its totient is φ = 19660800.

The previous prime is 68855807. The next prime is 68855819. The reversal of 68855808 is 80855886.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×68855808² = 9482244590665728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (68855803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42208 + ... + 43808.

It is an arithmetic number, because the mean of its divisors is an integer number (2186730).

Almost surely, 2^68855808 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 68855808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104963040).

68855808 is an abundant number, since it is smaller than the sum of its proper divisors (141070272).

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

68855808 is a wasteful number, since it uses less digits than its factorization.

68855808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1633 (or 1613 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 48.

The square root of 68855808 is about 8297.9399853217. The cubic root of 68855808 is about 409.8706869607.

The spelling of 68855808 in words is "sixty-eight million, eight hundred fifty-five thousand, eight hundred eight".