68281810 has 16 divisors (see below), whose sum is σ = 125905752. Its totient is φ = 26646400.

The previous prime is 68281799. The next prime is 68281819. The reversal of 68281810 is 1818286.

It can be written as a sum of positive squares in 4 ways, for example, as 34327881 + 33953929 = 5859^2 + 5827^2 .

It is a super-2 number, since 2×68281810² = 9324811153752200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68281819) 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, 82861 + ... + 83680.

Almost surely, 2^68281810 is an apocalyptic number.

68281810 is a deficient number, since it is larger than the sum of its proper divisors (57623942).

68281810 is a wasteful number, since it uses less digits than its factorization.

68281810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166589.

The product of its (nonzero) digits is 6144, while the sum is 34.

The square root of 68281810 is about 8263.2808254349. The cubic root of 68281810 is about 408.7285817068.

The spelling of 68281810 in words is "sixty-eight million, two hundred eighty-one thousand, eight hundred ten".