68815442 has 8 divisors (see below), whose sum is σ = 104915532. Its totient is φ = 33843600.

The previous prime is 68815403. The next prime is 68815451. The reversal of 68815442 is 24451886.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 43705321 + 25110121 = 6611^2 + 5011^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 68815396 and 68815405.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281909 + ... + 282152.

Almost surely, 2^68815442 is an apocalyptic number.

68815442 is a deficient number, since it is larger than the sum of its proper divisors (36100090).

68815442 is a wasteful number, since it uses less digits than its factorization.

68815442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564124.

The product of its digits is 61440, while the sum is 38.

The square root of 68815442 is about 8295.5073383127. The cubic root of 68815442 is about 409.7905771643.

The spelling of 68815442 in words is "sixty-eight million, eight hundred fifteen thousand, four hundred forty-two".