78195886 has 24 divisors (see below), whose sum is σ = 126766440. Its totient is φ = 36158592.

The previous prime is 78195863. The next prime is 78195947. The reversal of 78195886 is 68859187.

It is a super-2 number, since 2×78195886² = 12229193174649992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 32956 + ... + 35248.

It is an arithmetic number, because the mean of its divisors is an integer number (5281935).

Almost surely, 2^78195886 is an apocalyptic number.

78195886 is a deficient number, since it is larger than the sum of its proper divisors (48570554).

78195886 is a wasteful number, since it uses less digits than its factorization.

78195886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2388 (or 2371 counting only the distinct ones).

The product of its digits is 967680, while the sum is 52.

The square root of 78195886 is about 8842.8437733571. The cubic root of 78195886 is about 427.6232418295.

The spelling of 78195886 in words is "seventy-eight million, one hundred ninety-five thousand, eight hundred eighty-six".