2278208816 has 80 divisors (see below), whose sum is σ = 4947433344. Its totient is φ = 1009462272.

The previous prime is 2278208791. The next prime is 2278208827. The reversal of 2278208816 is 6188028722.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 515930 + ... + 520326.

Almost surely, 2^2278208816 is an apocalyptic number.

2278208816 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2278208816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2473716672).

2278208816 is an abundant number, since it is smaller than the sum of its proper divisors (2669224528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2278208816 is a wasteful number, since it uses less digits than its factorization.

2278208816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4518 (or 4512 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 44.

The square root of 2278208816 is about 47730.5857496009. The cubic root of 2278208816 is about 1315.8241189178.

The spelling of 2278208816 in words is "two billion, two hundred seventy-eight million, two hundred eight thousand, eight hundred sixteen".