68288405 has 8 divisors (see below), whose sum is σ = 86766552. Its totient is φ = 51417088.

The previous prime is 68288401. The next prime is 68288419. The reversal of 68288405 is 50488286.

It can be written as a sum of positive squares in 4 ways, for example, as 1343281 + 66945124 = 1159^2 + 8182^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68288405 - 2² = 68288401 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68288401) 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, 401612 + ... + 401781.

It is an arithmetic number, because the mean of its divisors is an integer number (10845819).

Almost surely, 2^68288405 is an apocalyptic number.

It is an amenable number.

68288405 is a deficient number, since it is larger than the sum of its proper divisors (18478147).

68288405 is a wasteful number, since it uses less digits than its factorization.

68288405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803415.

The product of its (nonzero) digits is 122880, while the sum is 41.

The square root of 68288405 is about 8263.6798703725. The cubic root of 68288405 is about 408.7417403026.

The spelling of 68288405 in words is "sixty-eight million, two hundred eighty-eight thousand, four hundred five".