78876872 has 32 divisors (see below), whose sum is σ = 157149720. Its totient is φ = 36986880.

The previous prime is 78876871. The next prime is 78876881. The reversal of 78876872 is 27867887.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 74407876 + 4468996 = 8626^2 + 2114^2 .

It is not an unprimeable number, because it can be changed into a prime (78876871) 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 7 ways as a sum of consecutive naturals, for example, 44972 + ... + 46692.

Almost surely, 2^78876872 is an apocalyptic number.

It is an amenable number.

78876872 is a deficient number, since it is larger than the sum of its proper divisors (78272848).

78876872 is a wasteful number, since it uses less digits than its factorization.

78876872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2081 (or 2077 counting only the distinct ones).

The product of its digits is 2107392, while the sum is 53.

The square root of 78876872 is about 8881.2652251805. The cubic root of 78876872 is about 428.8610058604.

It can be divided in two parts, 788768 and 72, that multiplied together give a square (56791296 = 7536²).

The spelling of 78876872 in words is "seventy-eight million, eight hundred seventy-six thousand, eight hundred seventy-two".