68169780 has 216 divisors, whose sum is σ = 246486240. Its totient is φ = 15200640.

The previous prime is 68169767. The next prime is 68169791. The reversal of 68169780 is 8796186.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 520315 + ... + 520445.

It is an arithmetic number, because the mean of its divisors is an integer number (1141140).

Almost surely, 2^68169780 is an apocalyptic number.

68169780 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68169780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123243120).

68169780 is an abundant number, since it is smaller than the sum of its proper divisors (178316460).

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

68169780 is a wasteful number, since it uses less digits than its factorization.

68169780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 68169780 is about 8256.4992581602. The cubic root of 68169780 is about 408.5049256148.

The spelling of 68169780 in words is "sixty-eight million, one hundred sixty-nine thousand, seven hundred eighty".