8440090778 has 16 divisors (see below), whose sum is σ = 14672513664. Its totient is φ = 3566235120.

The previous prime is 8440090751. The next prime is 8440090811. The reversal of 8440090778 is 8770900448.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4244525 + ... + 4246512.

It is an arithmetic number, because the mean of its divisors is an integer number (917032104).

Almost surely, 2^8440090778 is an apocalyptic number.

8440090778 is a deficient number, since it is larger than the sum of its proper divisors (6232422886).

8440090778 is a wasteful number, since it uses less digits than its factorization.

8440090778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8491117.

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 8440090778 is about 91869.9666811739. The cubic root of 8440090778 is about 2036.0215601138.

The spelling of 8440090778 in words is "eight billion, four hundred forty million, ninety thousand, seven hundred seventy-eight".