68628842 has 4 divisors (see below), whose sum is σ = 102943266. Its totient is φ = 34314420.

The previous prime is 68628841. The next prime is 68628869. The reversal of 68628842 is 24882686.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 44609041 + 24019801 = 6679^2 + 4901^2 .

It is a junction number, because it is equal to n+sod(n) for n = 68628793 and 68628802.

It is not an unprimeable number, because it can be changed into a prime (68628841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17157209 + ... + 17157212.

Almost surely, 2^68628842 is an apocalyptic number.

68628842 is a deficient number, since it is larger than the sum of its proper divisors (34314424).

68628842 is a wasteful number, since it uses less digits than its factorization.

68628842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34314423.

The product of its digits is 294912, while the sum is 44.

The square root of 68628842 is about 8284.2526518691. The cubic root of 68628842 is about 409.4198457330.

The spelling of 68628842 in words is "sixty-eight million, six hundred twenty-eight thousand, eight hundred forty-two".