68889578 has 4 divisors (see below), whose sum is σ = 103334370. Its totient is φ = 34444788.

The previous prime is 68889571. The next prime is 68889581. The reversal of 68889578 is 87598886.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87598886 = 2 ⋅43799443.

It can be written as a sum of positive squares in only one way, i.e., 61669609 + 7219969 = 7853^2 + 2687^2 .

It is a super-4 number, since 4×68889578⁴ (a number of 32 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (68889571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17222393 + ... + 17222396.

Almost surely, 2^68889578 is an apocalyptic number.

68889578 is a deficient number, since it is larger than the sum of its proper divisors (34444792).

68889578 is a wasteful number, since it uses less digits than its factorization.

68889578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34444791.

The product of its digits is 7741440, while the sum is 59.

The square root of 68889578 is about 8299.9745782743. The cubic root of 68889578 is about 409.9376823787.

The spelling of 68889578 in words is "sixty-eight million, eight hundred eighty-nine thousand, five hundred seventy-eight".