68656280 has 64 divisors (see below), whose sum is σ = 192602880. Its totient is φ = 21398400.

The previous prime is 68656267. The next prime is 68656283. The reversal of 68656280 is 8265686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68656283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8066 + ... + 14225.

It is an arithmetic number, because the mean of its divisors is an integer number (3009420).

Almost surely, 2^68656280 is an apocalyptic number.

It is an amenable number.

68656280 is an abundant number, since it is smaller than the sum of its proper divisors (123946600).

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

68656280 is a wasteful number, since it uses less digits than its factorization.

68656280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22320 (or 22316 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 68656280 is about 8285.9085198909. The cubic root of 68656280 is about 409.4744008571.

The spelling of 68656280 in words is "sixty-eight million, six hundred fifty-six thousand, two hundred eighty".