78786860 has 24 divisors (see below), whose sum is σ = 165812640. Its totient is φ = 31446144.

The previous prime is 78786809. The next prime is 78786887. The reversal of 78786860 is 6868787.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 78786799 and 78786808.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5696 + ... + 13784.

It is an arithmetic number, because the mean of its divisors is an integer number (6908860).

Almost surely, 2^78786860 is an apocalyptic number.

It is an amenable number.

78786860 is an abundant number, since it is smaller than the sum of its proper divisors (87025780).

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

78786860 is a wasteful number, since it uses less digits than its factorization.

78786860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8585 (or 8583 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 50.

The square root of 78786860 is about 8876.1962574067. The cubic root of 78786860 is about 428.6978091832.

The spelling of 78786860 in words is "seventy-eight million, seven hundred eighty-six thousand, eight hundred sixty".