8778398956 has 12 divisors (see below), whose sum is σ = 15428131992. Its totient is φ = 4370361248.

The previous prime is 8778398917. The next prime is 8778398963. The reversal of 8778398956 is 6598938778.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4708510 + ... + 4710373.

It is an arithmetic number, because the mean of its divisors is an integer number (1285677666).

Almost surely, 2^8778398956 is an apocalyptic number.

It is an amenable number.

8778398956 is a deficient number, since it is larger than the sum of its proper divisors (6649733036).

8778398956 is a wasteful number, since it uses less digits than its factorization.

8778398956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9419120 (or 9419118 counting only the distinct ones).

The product of its digits is 182891520, while the sum is 70.

The square root of 8778398956 is about 93693.1105044549. The cubic root of 8778398956 is about 2062.8695795427.

The spelling of 8778398956 in words is "eight billion, seven hundred seventy-eight million, three hundred ninety-eight thousand, nine hundred fifty-six".