123878404 has 24 divisors (see below), whose sum is σ = 245752640. Its totient is φ = 54165024.

The previous prime is 123878389. The next prime is 123878407. The reversal of 123878404 is 404878321.

It is not an unprimeable number, because it can be changed into a prime (123878407) 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 7 ways as a sum of consecutive naturals, for example, 61704 + ... + 63679.

Almost surely, 2^123878404 is an apocalyptic number.

It is an amenable number.

123878404 is a deficient number, since it is larger than the sum of its proper divisors (121874236).

123878404 is a wasteful number, since it uses less digits than its factorization.

123878404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125419 (or 125417 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 123878404 is about 11130.0675649342. The cubic root of 123878404 is about 498.5000434268.

The spelling of 123878404 in words is "one hundred twenty-three million, eight hundred seventy-eight thousand, four hundred four".