123878478 has 16 divisors (see below), whose sum is σ = 250894080. Its totient is φ = 40769976.

The previous prime is 123878407. The next prime is 123878497. The reversal of 123878478 is 874878321.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130200 + ... + 131147.

It is an arithmetic number, because the mean of its divisors is an integer number (15680880).

Almost surely, 2^123878478 is an apocalyptic number.

123878478 is an abundant number, since it is smaller than the sum of its proper divisors (127015602).

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

123878478 is a wasteful number, since it uses less digits than its factorization.

123878478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261431.

The product of its digits is 602112, while the sum is 48.

The square root of 123878478 is about 11130.0708892621. The cubic root of 123878478 is about 498.5001426881.

The spelling of 123878478 in words is "one hundred twenty-three million, eight hundred seventy-eight thousand, four hundred seventy-eight".