78424929398 has 8 divisors (see below), whose sum is σ = 118959162840. Its totient is φ = 38771875120.

The previous prime is 78424929391. The next prime is 78424929403. The reversal of 78424929398 is 89392942487.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78424929391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220294568 + ... + 220294923.

It is an arithmetic number, because the mean of its divisors is an integer number (14869895355).

Almost surely, 2^78424929398 is an apocalyptic number.

78424929398 is a deficient number, since it is larger than the sum of its proper divisors (40534233442).

78424929398 is a wasteful number, since it uses less digits than its factorization.

78424929398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440589582.

The product of its digits is 62705664, while the sum is 65.

The spelling of 78424929398 in words is "seventy-eight billion, four hundred twenty-four million, nine hundred twenty-nine thousand, three hundred ninety-eight".