68657478 has 16 divisors (see below), whose sum is σ = 139054080. Its totient is φ = 22595976.

The previous prime is 68657453. The next prime is 68657527. The reversal of 68657478 is 87475686.

It is a self number, because there is not a number n which added to its sum of digits gives 68657478.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71950 + ... + 72897.

It is an arithmetic number, because the mean of its divisors is an integer number (8690880).

Almost surely, 2^68657478 is an apocalyptic number.

68657478 is an abundant number, since it is smaller than the sum of its proper divisors (70396602).

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

68657478 is a wasteful number, since it uses less digits than its factorization.

68657478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144931.

The product of its digits is 2257920, while the sum is 51.

The square root of 68657478 is about 8285.9808109843. The cubic root of 68657478 is about 409.4767825158.

The spelling of 68657478 in words is "sixty-eight million, six hundred fifty-seven thousand, four hundred seventy-eight".