78819860 has 48 divisors (see below), whose sum is σ = 193581696. Its totient is φ = 26393472.

The previous prime is 78819859. The next prime is 78819863. The reversal of 78819860 is 6891887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78819863) 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, 527 + ... + 12566.

It is an arithmetic number, because the mean of its divisors is an integer number (4032952).

Almost surely, 2^78819860 is an apocalyptic number.

78819860 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78819860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96790848).

78819860 is an abundant number, since it is smaller than the sum of its proper divisors (114761836).

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

78819860 is a wasteful number, since it uses less digits than its factorization.

78819860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13152 (or 13150 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 47.

The square root of 78819860 is about 8878.0549671648. The cubic root of 78819860 is about 428.7576544120.

The spelling of 78819860 in words is "seventy-eight million, eight hundred nineteen thousand, eight hundred sixty".