68820885 has 24 divisors (see below), whose sum is σ = 136331520. Its totient is φ = 31460832.

The previous prime is 68820883. The next prime is 68820901. The reversal of 68820885 is 58802886.

It is not a de Polignac number, because 68820885 - 2¹ = 68820883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 68820885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68820883) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 108925 + ... + 109554.

It is an arithmetic number, because the mean of its divisors is an integer number (5680480).

Almost surely, 2^68820885 is an apocalyptic number.

It is an amenable number.

68820885 is a deficient number, since it is larger than the sum of its proper divisors (67510635).

68820885 is a wasteful number, since it uses less digits than its factorization.

68820885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218497 (or 218494 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 45.

The square root of 68820885 is about 8295.8354009708. The cubic root of 68820885 is about 409.8013810926.

The spelling of 68820885 in words is "sixty-eight million, eight hundred twenty thousand, eight hundred eighty-five".