78913042 has 32 divisors (see below), whose sum is σ = 138539520. Its totient is φ = 33384960.

The previous prime is 78913001. The next prime is 78913049. The reversal of 78913042 is 24031987.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 78912989 and 78913007.

It is not an unprimeable number, because it can be changed into a prime (78913049) 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 15 ways as a sum of consecutive naturals, for example, 12738 + ... + 17890.

It is an arithmetic number, because the mean of its divisors is an integer number (4329360).

Almost surely, 2^78913042 is an apocalyptic number.

78913042 is a deficient number, since it is larger than the sum of its proper divisors (59626478).

78913042 is a wasteful number, since it uses less digits than its factorization.

78913042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5218.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 78913042 is about 8883.3013007553. The cubic root of 78913042 is about 428.9265490787.

It can be divided in two parts, 789 and 13042, that added together give a palindrome (13831).

The spelling of 78913042 in words is "seventy-eight million, nine hundred thirteen thousand, forty-two".