68500140 has 48 divisors (see below), whose sum is σ = 203085792. Its totient is φ = 17191936.

The previous prime is 68500129. The next prime is 68500147. The reversal of 68500140 is 4100586.

It is a self number, because there is not a number n which added to its sum of digits gives 68500140.

It is not an unprimeable number, because it can be changed into a prime (68500147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32559 + ... + 34598.

It is an arithmetic number, because the mean of its divisors is an integer number (4230954).

Almost surely, 2^68500140 is an apocalyptic number.

68500140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68500140 is an abundant number, since it is smaller than the sum of its proper divisors (134585652).

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

68500140 is a wasteful number, since it uses less digits than its factorization.

68500140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67186 (or 67184 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 68500140 is about 8276.4811363284. The cubic root of 68500140 is about 409.1637525954.

The spelling of 68500140 in words is "sixty-eight million, five hundred thousand, one hundred forty".