68210784 has 72 divisors (see below), whose sum is σ = 200687760. Its totient is φ = 21950208.

The previous prime is 68210759. The next prime is 68210797. The reversal of 68210784 is 48701286.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×68210784² = 9305422107789312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 11 ways as a sum of consecutive naturals, for example, 4269 + ... + 12435.

It is an arithmetic number, because the mean of its divisors is an integer number (2787330).

Almost surely, 2^68210784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68210784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100343880).

68210784 is an abundant number, since it is smaller than the sum of its proper divisors (132476976).

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

68210784 is a wasteful number, since it uses less digits than its factorization.

68210784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8212 (or 8201 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 68210784 is about 8258.9820195954. The cubic root of 68210784 is about 408.5868141909.

The spelling of 68210784 in words is "sixty-eight million, two hundred ten thousand, seven hundred eighty-four".