68111892 has 18 divisors (see below), whose sum is σ = 172171818. Its totient is φ = 22703952.

The previous prime is 68111891. The next prime is 68111899. The reversal of 68111892 is 29811186.

It can be written as a sum of positive squares in only one way, i.e., 57062916 + 11048976 = 7554^2 + 3324^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1891997 = 68111892 / (6 + 8 + 1 + 1 + 1 + 8 + 9 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68111891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 945963 + ... + 946034.

It is an arithmetic number, because the mean of its divisors is an integer number (9565101).

Almost surely, 2^68111892 is an apocalyptic number.

It is an amenable number.

68111892 is an abundant number, since it is smaller than the sum of its proper divisors (104059926).

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

68111892 is a wasteful number, since it uses less digits than its factorization.

68111892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1892007 (or 1892002 counting only the distinct ones).

The product of its digits is 6912, while the sum is 36.

The square root of 68111892 is about 8252.9929116654. The cubic root of 68111892 is about 408.3892622915.

The spelling of 68111892 in words is "sixty-eight million, one hundred eleven thousand, eight hundred ninety-two".