68255140 has 36 divisors (see below), whose sum is σ = 145597788. Its totient is φ = 26877760.

The previous prime is 68255137. The next prime is 68255141. The reversal of 68255140 is 4155286.

It can be written as a sum of positive squares in 2 ways, for example, as 52446564 + 15808576 = 7242^2 + 3976^2 .

It is not an unprimeable number, because it can be changed into a prime (68255141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100482 + ... + 101158.

It is an arithmetic number, because the mean of its divisors is an integer number (4044383).

Almost surely, 2^68255140 is an apocalyptic number.

It is an amenable number.

68255140 is an abundant number, since it is smaller than the sum of its proper divisors (77342648).

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

68255140 is a wasteful number, since it uses less digits than its factorization.

68255140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828 (or 755 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 68255140 is about 8261.6669020241. Note that the first 3 decimals coincide. The cubic root of 68255140 is about 408.6753600615.

The spelling of 68255140 in words is "sixty-eight million, two hundred fifty-five thousand, one hundred forty".