68131206 has 160 divisors (see below), whose sum is σ = 191001888. Its totient is φ = 17832960.

The previous prime is 68131201. The next prime is 68131241. The reversal of 68131206 is 60213186.

It is a super-2 number, since 2×68131206² = 9283722462028872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 68131206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68131201) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 393736 + ... + 393908.

Almost surely, 2^68131206 is an apocalyptic number.

68131206 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 68131206, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95500944).

68131206 is an abundant number, since it is smaller than the sum of its proper divisors (122870682).

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

68131206 is a wasteful number, since it uses less digits than its factorization.

68131206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 68131206 is about 8254.1629496879. The cubic root of 68131206 is about 408.4278599800.

The spelling of 68131206 in words is "sixty-eight million, one hundred thirty-one thousand, two hundred six".