8121788 has 12 divisors (see below), whose sum is σ = 14515872. Its totient is φ = 3974400.

The previous prime is 8121749. The next prime is 8121793. The reversal of 8121788 is 8871218.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21413 + ... + 21788.

It is an arithmetic number, because the mean of its divisors is an integer number (1209656).

Almost surely, 2^8121788 is an apocalyptic number.

It is an amenable number.

8121788 is a deficient number, since it is larger than the sum of its proper divisors (6394084).

8121788 is a wasteful number, since it uses less digits than its factorization.

8121788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43252 (or 43250 counting only the distinct ones).

The product of its digits is 7168, while the sum is 35.

The square root of 8121788 is about 2849.8750849818. The cubic root of 8121788 is about 201.0097930098.

The spelling of 8121788 in words is "eight million, one hundred twenty-one thousand, seven hundred eighty-eight".