78829042 has 4 divisors (see below), whose sum is σ = 118243566. Its totient is φ = 39414520.

The previous prime is 78829021. The next prime is 78829057. The reversal of 78829042 is 24092887.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 61763881 + 17065161 = 7859^2 + 4131^2 .

It is a junction number, because it is equal to n+sod(n) for n = 78828986 and 78829004.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19707259 + ... + 19707262.

Almost surely, 2^78829042 is an apocalyptic number.

78829042 is a deficient number, since it is larger than the sum of its proper divisors (39414524).

78829042 is a wasteful number, since it uses less digits than its factorization.

78829042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39414523.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 78829042 is about 8878.5720698770. The cubic root of 78829042 is about 428.7743029231.

The spelling of 78829042 in words is "seventy-eight million, eight hundred twenty-nine thousand, forty-two".