68718280 has 16 divisors (see below), whose sum is σ = 154616220. Its totient is φ = 27487296.

The previous prime is 68718271. The next prime is 68718281. The reversal of 68718280 is 8281786.

It can be written as a sum of positive squares in 2 ways, for example, as 64931364 + 3786916 = 8058^2 + 1946^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 1717957 = 68718280 / (6 + 8 + 7 + 1 + 8 + 2 + 8 + 0).

It is not an unprimeable number, because it can be changed into a prime (68718281) 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, 858939 + ... + 859018.

Almost surely, 2^68718280 is an apocalyptic number.

It is an amenable number.

68718280 is an abundant number, since it is smaller than the sum of its proper divisors (85897940).

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

68718280 is a wasteful number, since it uses less digits than its factorization.

68718280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1717968 (or 1717964 counting only the distinct ones).

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

The square root of 68718280 is about 8289.6489672362. The cubic root of 68718280 is about 409.5976222854.

It can be divided in two parts, 6871 and 8280, that added together give a palindrome (15151).

The spelling of 68718280 in words is "sixty-eight million, seven hundred eighteen thousand, two hundred eighty".