78706842 has 16 divisors (see below), whose sum is σ = 158103840. Its totient is φ = 26120592.

The previous prime is 78706781. The next prime is 78706847. The reversal of 78706842 is 24860787.

It is a super-2 number, since 2×78706842² = 12389533955225928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78706794 and 78706803.

It is not an unprimeable number, because it can be changed into a prime (78706847) 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, 27268 + ... + 30015.

It is an arithmetic number, because the mean of its divisors is an integer number (9881490).

Almost surely, 2^78706842 is an apocalyptic number.

78706842 is an abundant number, since it is smaller than the sum of its proper divisors (79396998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78706842 is a wasteful number, since it uses less digits than its factorization.

78706842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57517.

The product of its (nonzero) digits is 150528, while the sum is 42.

The square root of 78706842 is about 8871.6876635734. The cubic root of 78706842 is about 428.5526277784.

The spelling of 78706842 in words is "seventy-eight million, seven hundred six thousand, eight hundred forty-two".