78927885 has 32 divisors (see below), whose sum is σ = 141096960. Its totient is φ = 41860800.

The previous prime is 78927859. The next prime is 78927907. The reversal of 78927885 is 58872987.

It is not a de Polignac number, because 78927885 - 2¹⁶ = 78862349 is a prime.

It is a super-2 number, since 2×78927885² = 12459222061146450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 24255 + ... + 27315.

It is an arithmetic number, because the mean of its divisors is an integer number (4409280).

Almost surely, 2^78927885 is an apocalyptic number.

It is an amenable number.

78927885 is a deficient number, since it is larger than the sum of its proper divisors (62169075).

78927885 is a wasteful number, since it uses less digits than its factorization.

78927885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3266 (or 3260 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 54.

The square root of 78927885 is about 8884.1367053867. The cubic root of 78927885 is about 428.9534401032.

The spelling of 78927885 in words is "seventy-eight million, nine hundred twenty-seven thousand, eight hundred eighty-five".