78829831 has 8 divisors (see below), whose sum is σ = 80156160. Its totient is φ = 77512632.

The previous prime is 78829823. The next prime is 78829837. The reversal of 78829831 is 13892887.

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

It is a cyclic number.

It is not a de Polignac number, because 78829831 - 2³ = 78829823 is a prime.

It is a super-2 number, since 2×78829831² = 12428284510977122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78829837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16380 + ... + 20638.

It is an arithmetic number, because the mean of its divisors is an integer number (10019520).

Almost surely, 2^78829831 is an apocalyptic number.

78829831 is a deficient number, since it is larger than the sum of its proper divisors (1326329).

78829831 is a wasteful number, since it uses less digits than its factorization.

78829831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4565.

The product of its digits is 193536, while the sum is 46.

The square root of 78829831 is about 8878.6165025864. The cubic root of 78829831 is about 428.7757334525.

The spelling of 78829831 in words is "seventy-eight million, eight hundred twenty-nine thousand, eight hundred thirty-one".