68391120 has 80 divisors (see below), whose sum is σ = 242305920. Its totient is φ = 15631872.

The previous prime is 68391109. The next prime is 68391137. The reversal of 68391120 is 2119386.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18675 + ... + 22034.

It is an arithmetic number, because the mean of its divisors is an integer number (3028824).

Almost surely, 2^68391120 is an apocalyptic number.

68391120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68391120 is an abundant number, since it is smaller than the sum of its proper divisors (173914800).

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

68391120 is a wasteful number, since it uses less digits than its factorization.

68391120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40732 (or 40726 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 68391120 is about 8269.8923814038. The cubic root of 68391120 is about 408.9465719311.

The spelling of 68391120 in words is "sixty-eight million, three hundred ninety-one thousand, one hundred twenty".