68396340 has 72 divisors (see below), whose sum is σ = 196166880. Its totient is φ = 17800896.

The previous prime is 68396329. The next prime is 68396357. The reversal of 68396340 is 4369386.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 491991 + ... + 492129.

It is an arithmetic number, because the mean of its divisors is an integer number (2724540).

Almost surely, 2^68396340 is an apocalyptic number.

68396340 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 68396340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98083440).

68396340 is an abundant number, since it is smaller than the sum of its proper divisors (127770540).

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

68396340 is a wasteful number, since it uses less digits than its factorization.

68396340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 39.

The square root of 68396340 is about 8270.2079780378. The cubic root of 68396340 is about 408.9569760440.

The spelling of 68396340 in words is "sixty-eight million, three hundred ninety-six thousand, three hundred forty".