68841780 has 48 divisors (see below), whose sum is σ = 220295040. Its totient is φ = 15735168.

The previous prime is 68841779. The next prime is 68841791. The reversal of 68841780 is 8714886.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 81535 + ... + 82374.

It is an arithmetic number, because the mean of its divisors is an integer number (4589480).

Almost surely, 2^68841780 is an apocalyptic number.

68841780 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68841780 is an abundant number, since it is smaller than the sum of its proper divisors (151453260).

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

68841780 is a wasteful number, since it uses less digits than its factorization.

68841780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163928 (or 163926 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 42.

The square root of 68841780 is about 8297.0946722332. The cubic root of 68841780 is about 409.8428507395.

The spelling of 68841780 in words is "sixty-eight million, eight hundred forty-one thousand, seven hundred eighty".