68782540 has 24 divisors (see below), whose sum is σ = 145257840. Its totient is φ = 27357888.

The previous prime is 68782537. The next prime is 68782541. The reversal of 68782540 is 4528786.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 68782493 and 68782502.

It is not an unprimeable number, because it can be changed into a prime (68782541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6027 + ... + 13186.

It is an arithmetic number, because the mean of its divisors is an integer number (6052410).

Almost surely, 2^68782540 is an apocalyptic number.

It is an amenable number.

68782540 is an abundant number, since it is smaller than the sum of its proper divisors (76475300).

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

68782540 is a wasteful number, since it uses less digits than its factorization.

68782540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19401 (or 19399 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 68782540 is about 8293.5239795879. The cubic root of 68782540 is about 409.7252571403.

The spelling of 68782540 in words is "sixty-eight million, seven hundred eighty-two thousand, five hundred forty".