68887120 has 20 divisors (see below), whose sum is σ = 160162740. Its totient is φ = 27554816.

The previous prime is 68887109. The next prime is 68887127. The reversal of 68887120 is 2178886.

It can be written as a sum of positive squares in 2 ways, for example, as 22810176 + 46076944 = 4776^2 + 6788^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68887127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 430465 + ... + 430624.

It is an arithmetic number, because the mean of its divisors is an integer number (8008137).

Almost surely, 2^68887120 is an apocalyptic number.

It is an amenable number.

68887120 is an abundant number, since it is smaller than the sum of its proper divisors (91275620).

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

68887120 is a wasteful number, since it uses less digits than its factorization.

68887120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861102 (or 861096 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 40.

The square root of 68887120 is about 8299.8265042108. The cubic root of 68887120 is about 409.9328067558.

The spelling of 68887120 in words is "sixty-eight million, eight hundred eighty-seven thousand, one hundred twenty".