78859146 has 16 divisors (see below), whose sum is σ = 158764608. Its totient is φ = 26112000.

The previous prime is 78859129. The next prime is 78859147. The reversal of 78859146 is 64195887.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 78859095 and 78859104.

It is not an unprimeable number, because it can be changed into a prime (78859147) 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, 42615 + ... + 44426.

It is an arithmetic number, because the mean of its divisors is an integer number (9922788).

Almost surely, 2^78859146 is an apocalyptic number.

78859146 is an abundant number, since it is smaller than the sum of its proper divisors (79905462).

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

78859146 is a wasteful number, since it uses less digits than its factorization.

78859146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87197.

The product of its digits is 483840, while the sum is 48.

The square root of 78859146 is about 8880.2672257089. The cubic root of 78859146 is about 428.8288774746.

The spelling of 78859146 in words is "seventy-eight million, eight hundred fifty-nine thousand, one hundred forty-six".