68257810 has 8 divisors (see below), whose sum is σ = 122864076. Its totient is φ = 27303120.

The previous prime is 68257807. The next prime is 68257811. The reversal of 68257810 is 1875286.

It can be written as a sum of positive squares in 2 ways, for example, as 68244121 + 13689 = 8261^2 + 117^2 .

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

It is a super-2 number, since 2×68257810² = 9318257251992200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68257810.

It is not an unprimeable number, because it can be changed into a prime (68257811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3412881 + ... + 3412900.

Almost surely, 2^68257810 is an apocalyptic number.

68257810 is a deficient number, since it is larger than the sum of its proper divisors (54606266).

68257810 is a wasteful number, since it uses less digits than its factorization.

68257810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6825788.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 68257810 is about 8261.8284901104. The cubic root of 68257810 is about 408.6806888372.

The spelling of 68257810 in words is "sixty-eight million, two hundred fifty-seven thousand, eight hundred ten".