68655040 has 56 divisors (see below), whose sum is σ = 165780720. Its totient is φ = 27076608.

The previous prime is 68655031. The next prime is 68655043. The reversal of 68655040 is 4055686.

It is a junction number, because it is equal to n+sod(n) for n = 68654987 and 68655005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68655043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21891 + ... + 24829.

It is an arithmetic number, because the mean of its divisors is an integer number (2960370).

Almost surely, 2^68655040 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 68655040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82890360).

68655040 is an abundant number, since it is smaller than the sum of its proper divisors (97125680).

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

68655040 is a wasteful number, since it uses less digits than its factorization.

68655040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3029 (or 3019 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 68655040 is about 8285.8336937209. The cubic root of 68655040 is about 409.4719356720.

The spelling of 68655040 in words is "sixty-eight million, six hundred fifty-five thousand, forty".