68194440 has 128 divisors (see below), whose sum is σ = 229132800. Its totient is φ = 18040320.

The previous prime is 68194421. The next prime is 68194453. The reversal of 68194440 is 4449186.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 68194395 and 68194404.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 251505 + ... + 251775.

It is an arithmetic number, because the mean of its divisors is an integer number (1790100).

Almost surely, 2^68194440 is an apocalyptic number.

68194440 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 68194440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114566400).

68194440 is an abundant number, since it is smaller than the sum of its proper divisors (160938360).

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

68194440 is a wasteful number, since it uses less digits than its factorization.

68194440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524 (or 514 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 68194440 is about 8257.9924921254. The cubic root of 68194440 is about 408.5541777272.

The spelling of 68194440 in words is "sixty-eight million, one hundred ninety-four thousand, four hundred forty".