68639158 has 8 divisors (see below), whose sum is σ = 117667152. Its totient is φ = 29416776.

The previous prime is 68639141. The next prime is 68639209. The reversal of 68639158 is 85193686.

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

It is a super-2 number, since 2×68639158² = 9422668021897928, which contains 22 as substring.

It is a congruent number.

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, 2451385 + ... + 2451412.

It is an arithmetic number, because the mean of its divisors is an integer number (14708394).

Almost surely, 2^68639158 is an apocalyptic number.

68639158 is a deficient number, since it is larger than the sum of its proper divisors (49027994).

68639158 is a wasteful number, since it uses less digits than its factorization.

68639158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4902806.

The product of its digits is 311040, while the sum is 46.

The square root of 68639158 is about 8284.8752555485. The cubic root of 68639158 is about 409.4403587971.

The spelling of 68639158 in words is "sixty-eight million, six hundred thirty-nine thousand, one hundred fifty-eight".