68344540 has 48 divisors (see below), whose sum is σ = 160411104. Its totient is φ = 24243200.

The previous prime is 68344519. The next prime is 68344567. The reversal of 68344540 is 4544386.

It is a super-2 number, since 2×68344540² = 9341952295623200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 68344496 and 68344505.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5232 + ... + 12808.

It is an arithmetic number, because the mean of its divisors is an integer number (3341898).

Almost surely, 2^68344540 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 68344540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80205552).

68344540 is an abundant number, since it is smaller than the sum of its proper divisors (92066564).

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

68344540 is a wasteful number, since it uses less digits than its factorization.

68344540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7638 (or 7636 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 34.

The square root of 68344540 is about 8267.0756619254. The cubic root of 68344540 is about 408.8537087175.

The spelling of 68344540 in words is "sixty-eight million, three hundred forty-four thousand, five hundred forty".