8428661144 has 32 divisors (see below), whose sum is σ = 16502400000. Its totient is φ = 4028277792.

The previous prime is 8428661009. The next prime is 8428661173. The reversal of 8428661144 is 4411668248.

It is a junction number, because it is equal to n+sod(n) for n = 8428661095 and 8428661104.

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 7 ways as a sum of consecutive naturals, for example, 260537 + ... + 291095.

It is an arithmetic number, because the mean of its divisors is an integer number (515700000).

Almost surely, 2^8428661144 is an apocalyptic number.

It is an amenable number.

8428661144 is a deficient number, since it is larger than the sum of its proper divisors (8073738856).

8428661144 is a wasteful number, since it uses less digits than its factorization.

8428661144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32087 (or 32083 counting only the distinct ones).

The product of its digits is 294912, while the sum is 44.

The square root of 8428661144 is about 91807.7401094265. The cubic root of 8428661144 is about 2035.1020797295.

The spelling of 8428661144 in words is "eight billion, four hundred twenty-eight million, six hundred sixty-one thousand, one hundred forty-four".