78786858 has 32 divisors (see below), whose sum is σ = 160358400. Its totient is φ = 25801776.

The previous prime is 78786809. The next prime is 78786887. The reversal of 78786858 is 85868787.

It is a junction number, because it is equal to n+sod(n) for n = 78786798 and 78786807.

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 15 ways as a sum of consecutive naturals, for example, 169935 + ... + 170397.

It is an arithmetic number, because the mean of its divisors is an integer number (5011200).

Almost surely, 2^78786858 is an apocalyptic number.

78786858 is an abundant number, since it is smaller than the sum of its proper divisors (81571542).

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

78786858 is a wasteful number, since it uses less digits than its factorization.

78786858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906.

The product of its digits is 6021120, while the sum is 57.

The square root of 78786858 is about 8876.1961447458. The cubic root of 78786858 is about 428.6978055557.

The spelling of 78786858 in words is "seventy-eight million, seven hundred eighty-six thousand, eight hundred fifty-eight".