68447878 has 8 divisors (see below), whose sum is σ = 102754872. Its totient is φ = 34196256.

The previous prime is 68447867. The next prime is 68447879. The reversal of 68447878 is 87874486.

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

It is a super-2 number, since 2×68447878² = 9370224005405768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68447879) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 10600 + ... + 15787.

It is an arithmetic number, because the mean of its divisors is an integer number (12844359).

Almost surely, 2^68447878 is an apocalyptic number.

68447878 is a deficient number, since it is larger than the sum of its proper divisors (34306994).

68447878 is a wasteful number, since it uses less digits than its factorization.

68447878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27686.

The product of its digits is 2408448, while the sum is 52.

The square root of 68447878 is about 8273.3232742351. The cubic root of 68447878 is about 409.0596693212.

The spelling of 68447878 in words is "sixty-eight million, four hundred forty-seven thousand, eight hundred seventy-eight".