68244390 has 128 divisors (see below), whose sum is σ = 195955200. Its totient is φ = 16848000.

The previous prime is 68244389. The next prime is 68244437. The reversal of 68244390 is 9344286.

It is a happy number.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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 63 ways as a sum of consecutive naturals, for example, 271765 + ... + 272015.

It is an arithmetic number, because the mean of its divisors is an integer number (1530900).

Almost surely, 2^68244390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68244390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97977600).

68244390 is an abundant number, since it is smaller than the sum of its proper divisors (127710810).

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

68244390 is a wasteful number, since it uses less digits than its factorization.

68244390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339 (or 333 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 68244390 is about 8261.0162813058. The cubic root of 68244390 is about 408.6539038470.

The spelling of 68244390 in words is "sixty-eight million, two hundred forty-four thousand, three hundred ninety".