68420286 has 96 divisors (see below), whose sum is σ = 170366976. Its totient is φ = 19656000.

The previous prime is 68420279. The next prime is 68420293. The reversal of 68420286 is 68202486.

It is an interprime number because it is at equal distance from previous prime (68420279) and next prime (68420293).

It is a Curzon number.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 68420286.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 435720 + ... + 435876.

It is an arithmetic number, because the mean of its divisors is an integer number (1774656).

Almost surely, 2^68420286 is an apocalyptic number.

68420286 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 68420286, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85183488).

68420286 is an abundant number, since it is smaller than the sum of its proper divisors (101946690).

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

68420286 is a wasteful number, since it uses less digits than its factorization.

68420286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 275 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 68420286 is about 8271.6555779360. The cubic root of 68420286 is about 409.0046966341.

The spelling of 68420286 in words is "sixty-eight million, four hundred twenty thousand, two hundred eighty-six".