68440242 has 32 divisors (see below), whose sum is σ = 155171520. Its totient is φ = 19949760.

The previous prime is 68440189. The next prime is 68440243. The reversal of 68440242 is 24204486.

It is not an unprimeable number, because it can be changed into a prime (68440243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21609 + ... + 24572.

It is an arithmetic number, because the mean of its divisors is an integer number (4849110).

Almost surely, 2^68440242 is an apocalyptic number.

68440242 is an abundant number, since it is smaller than the sum of its proper divisors (86731278).

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

68440242 is a wasteful number, since it uses less digits than its factorization.

68440242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46218.

The product of its (nonzero) digits is 12288, while the sum is 30.

The square root of 68440242 is about 8272.8617781273. The cubic root of 68440242 is about 409.0444572801.

The spelling of 68440242 in words is "sixty-eight million, four hundred forty thousand, two hundred forty-two".