68678844 has 192 divisors, whose sum is σ = 203212800. Its totient is φ = 17805312.

The previous prime is 68678837. The next prime is 68678849. The reversal of 68678844 is 44887686.

It is a super-2 number, since 2×68678844² = 9433567226352672, which contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68678849) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1461229 + ... + 1461275.

It is an arithmetic number, because the mean of its divisors is an integer number (1058400).

Almost surely, 2^68678844 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 68678844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101606400).

68678844 is an abundant number, since it is smaller than the sum of its proper divisors (134533956).

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

68678844 is a wasteful number, since it uses less digits than its factorization.

68678844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 130 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 51.

The square root of 68678844 is about 8287.2699968084. The cubic root of 68678844 is about 409.5192540901.

The spelling of 68678844 in words is "sixty-eight million, six hundred seventy-eight thousand, eight hundred forty-four".