68775140 has 24 divisors (see below), whose sum is σ = 165060672. Its totient is φ = 23580000.

The previous prime is 68775043. The next prime is 68775169. The reversal of 68775140 is 4157786.

It is a super-3 number, since 3×68775140³ (a number of 24 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 68775094 and 68775103.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245486 + ... + 245765.

It is an arithmetic number, because the mean of its divisors is an integer number (6877528).

Almost surely, 2^68775140 is an apocalyptic number.

It is an amenable number.

68775140 is an abundant number, since it is smaller than the sum of its proper divisors (96285532).

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

68775140 is a wasteful number, since it uses less digits than its factorization.

68775140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491267 (or 491265 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 68775140 is about 8293.0778363645. The cubic root of 68775140 is about 409.7105631223.

The spelling of 68775140 in words is "sixty-eight million, seven hundred seventy-five thousand, one hundred forty".