68502144 has 128 divisors (see below), whose sum is σ = 197064000. Its totient is φ = 21012480.

The previous prime is 68502113. The next prime is 68502151. The reversal of 68502144 is 44120586.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 299022 + ... + 299250.

Almost surely, 2^68502144 is an apocalyptic number.

68502144 is a gapful number since it is divisible by the number (64) 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 68502144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98532000).

68502144 is an abundant number, since it is smaller than the sum of its proper divisors (128561856).

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

68502144 is a wasteful number, since it uses less digits than its factorization.

68502144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306 (or 294 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 68502144 is about 8276.6022013868. The cubic root of 68502144 is about 409.1677426415.

The spelling of 68502144 in words is "sixty-eight million, five hundred two thousand, one hundred forty-four".