68394456 has 160 divisors (see below), whose sum is σ = 215883360. Its totient is φ = 20072448.

The previous prime is 68394449. The next prime is 68394457. The reversal of 68394456 is 65449386.

It is a super-2 number, since 2×68394456² = 9355603223071872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68394457) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 193576 + ... + 193928.

It is an arithmetic number, because the mean of its divisors is an integer number (1349271).

Almost surely, 2^68394456 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 68394456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107941680).

68394456 is an abundant number, since it is smaller than the sum of its proper divisors (147488904).

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

68394456 is a wasteful number, since it uses less digits than its factorization.

68394456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407 (or 394 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 68394456 is about 8270.0940744347. The cubic root of 68394456 is about 408.9532210574.

It can be divided in two parts, 6839445 and 6, that added together give a triangular number (6839451 = T₃₆₉₈).

The spelling of 68394456 in words is "sixty-eight million, three hundred ninety-four thousand, four hundred fifty-six".